Kronik: Uønsket farvemutation - Om DEC (Yellow) mutation hos Agapornis lilianae (Jordbærhovedet dværgpapegøje)
DEC (Yellow) farvemutation af Agapornis lilianae. Jeg blev noget overrasket, da der pludselig optrådte en sådan farvemutation blandt ungerne af de superflotte vildtfarvede forældrefugle, som jeg tidligere har købt hos en førende europæisk opdrætter som vildtfarvede såvel af fænotype som af genotype. På dette foto er fuglen nogle få uger gammel og er taget ud af redekassen i forbindelse med en redekontrol
En uventet overraskelse
Med nogle enkelte undtagelser beskæftiger jeg mig ikke med farvemutationer blandt papegøjer, da jeg synes, at de vildtfarvede fugle i sig selv er meget smukke, og det er vigtigt, at man som seriøs fugleholder bidrager til naturbevarelse af de vildtfarvede fuglearter under beskyttede forhold.
Når jeg så endelig arbejder med farvemutationer af en given art, så har jeg som princip at have en vildtfarvet stamme af samme art i topkvalitet, som jeg kan benytte som ”hovedblodlinje” og referencegrundlag for farvemutationerne. Stammen af vildtfarvede fugle holdes fysisk strengt adskilt fra stammen af mutationsfugle. Min vildtfarvede stamme af Agapornis lilianae er over de senere år bygget op af nøje selekterede fugle fra en række af Europas førende opdrættere, som alle fører stambog over deres fugle. Nu har jeg – ufrivilligt – fået noget af en overraskelse, hvilket skete da jeg i forsommeren 2011 lavede redekontrol hos min stamme af artsrene, vildtfarvede Agapornis lilianae. Her konstaterede jeg, at der hos et par af forældrefuglene – som tidligere udelukkende har fået vildtfarvede unger hos mig – blandt de vildtfarvede unger også lå en unge i redekassen med et ganske anderledes udseende, idet den virkede meget lys. Min interesse blev skærpet, og da ungen kom ud over dundragtstadiet og fik fjer, begyndte der at tegne sig et rids af en gul, dog ikke hel gul, fugl. I redekassen virkede ungen, der har mørke øjne, nærmest lysende - meget lys – ”neongulgrøn”, og i starten virkede det, som om, at der var tale som en Dilute farvemutation, som opstod i det sydlige Tyskland i 2005.
Her ses DEC (Yellow) farvemutationen af Agapornis lilianae lige efter udflyvningen fra redekassen. Fuglen er både vurderet af en førende europæisk opdrætter af Agapornis lilianae og af mutationseksperten Dirk Van den Abeele, og begge hæfter sig ved, at kropsfarven er mere gul end grøn, hvilket bl.a. adskiller den fra Dilute farvemutationen
Ungens forældre er ubeslægtede, og de er begge købt som vildtfarvede fugle – også af genotype – hos en af Europas førende opdrættere afAgapornis lilianae, så jeg fandt det derfor naturligt at kontakte denne opdrætter på ny for at høre nærmere omkring forældrefuglene. Ved samme lejlighed fremsendte jeg fotos af fuglen. Opdrætteren, der også opdrætter Dilute og Lutino farvemutationer af Agapornis lilianae blev yderst overrasket over, at der var opstået en farvemutation af disse forældrefugle. Han ville gerne undersøge sagen nærmere, og han kontrollerede derfor sine stambogsregistreringer på ny og vendte efter nogle dage tilbage til mig. Han bekræftede skriftligt, at begge forældrefugle, der har givet denne anderledes farvet unge, kommer fra to stammer af virkeligt gode vildtfarvede Agapornis lilianae, som han har haft i besiddelse i en årrække. I alle disse år har han aldrig nogensinde fået nogen farvemutationer fra disse par, udelukkende rigtigt gode vildtfarvede fugle. Kvaliteten af disse vildtfarvede fugle var i øvrigt baggrunden for, at opdrætteren altid selv har beholdt de fleste fugle fra disse blodlinjer. Specielt den ene af de to fugle, som jeg købte, betegner opdrætteren som unik, og han siger, at det var mit held, at han ”kom til” at sælge den til mig, da han egentlig selv ville have beholdt den. På baggrund af de farvefotos som jeg fremsendte til opdrætteren (se nedenfor), har han vurderet, at ungen er for gul til at være en Dilute. Han mener, at der er tale om en Sortøjet Gul farvemutation, idet Dilute farvemutationen virker mere grøn på en særlig måde end den unge, som jeg fremsendte foto på. Han var på mine vegne glad for, at der helt uventet er opstået en flot mutationsfugl (selv om jeg ikke er interesseret i, at der opstår farvemutationer blandt min stamme af vildtfarvede, mutationsfri Agapornis lilianae).
For at være helt sikker på hvilken mutation, der er tale om, henvendte jeg mig samtidig til Dirk Van den Abeele, der bl.a. er forfatter til en række udmærkede bøger om dværgpapegøjer primært med fokus på Agapornis-slægtens farvemutationer. Dirk Van den Abeele mener, at der er tale om en DEC farvemutation – Dark Eyed Clear (yellow) eller populært blot kaldet DEC (Yellow). Lige præcis denne farvemutation hos Agapornis lilianae fremgår ikke af 2005-udgaven af hans bog ”Lovebirds – Owners manual and reference guide”.
DEC (Yellow) farvemutationen af Agapornis lilianae er en smuk fugl, som fremtræder meget forskelligt afhængig af, i hvilken belysning man ser den. Sidder den i skygge virker den lidt mere grønlig, end når den sidder i direkte sollys, hvor den forekommer meget gul. I modsætning til Lutino farvemutationen, der på nær den røde ansigtsmaske ikke har en egentlig farvetegning, så har DEC (Yellow) farvemutationen en meget svagt antydet farvetegning, idet den normalt grønne kropsfarve er meget lys ”neongrøn”, ligesom halefjerenes artstypiske farvetegning fremtræder som på den vildtfarvede Agapornis lilianae blot med en anden ”farvelade”
I ovennævnte bog anføres, at en Dark Eyed Clear farvemutation er kendetegnet ved, at eumelaninen (det mørke pigment) i fjerdragten er reduceret med ca. 95 %, men med en uændret ansigtsmaske, altså svarende til den vildtfarvede fugl.
Det er værd at bemærke, at fjerdragten hos Dilute farvemutationen ”kun” er reduceret med 80 – 90 % (jeg plejer at sige, at kropsfarven hos Dilute farvemutationer af Agapornis lilianae er ”neongrøn”).
Samme sted kan man læse, at Dark Eyed Clear farvemutationen første gang opstod hos Agapornis fischeri, og at det hos denne art ikke er usædvanligt at se fugle med ”grønne pletter” på f.eks. ryggen og omkring benene. I den forbindelse skal det nævnes, at min DEC (Yellow) har en meget ensartet farvet fjerdragt.
Dark Eyed Clear farvemutationer arver - ligesom Lutino farvemutationen hos Agapornis lilianae - autosomal recessivt, så både hanner og hunner kan derfor være splitfugle.
Dark Eyed Clear er en relativt ny farvemutation blandt Agapornis-slægten, og som tidligere nævnt kan man desværre ikke se foto af denne Agapornis lilianae farvemutation i 2005-udgaven af Dirk Van den Abeele’s bog ”Lovebirds – Owners manual and reference guide”, men han er nu i besiddelse af farvefotos af min fugl, så det kan jo være, at disse dukker op i en senere publikation.
Her ses en af DEC (Yellow) farvemutationens vildtfarvede søskende fra samme kuld umiddelbart efter udflyvningen fra redekassen. Som det kan ses af billedet, har denne søskendefugl den artstypiske farvetegning, der kendetegner fjerdragten på de vildtfarvede Agapornis lilianae. De unger, som jeg tidligere har fremavlet på forældrefuglene, har udelukkende været flotte vildtfarvede Agapornis lilianae
Det er tankevækkende, at forældrefuglene til denne farvemutation er købt som vildtfarvede fugle også genotypemæssigt, altså som ”mutationsfri”. Begge forældrefugle er i absolut topkvalitet og har en fuldstændig artstypisk fænotype, herunder farvetegning. Det samme gælder mutationsfuglens vildtfarvede søskende fra samme kuld, jf. nedenstående foto. Dette viser jo bare, at selv seriøse opdrættere ikke kan garantere for fuglenes genotype, selv om man fører nøje registreringer over sine fugle. I dette tilfælde er der jo opstået en farvemutation blandt fugle, hvor der gennem årene - ifølge opdrætteren - aldrig tidligere er fremavlet farvemutationer. Imidlertid har begge de indkøbte forældrefugle åbenbart været split for Dark Eyed Clear (Yellow), og derfor skal de fremover holdes fysisk adskilt fra mine øvrige vildtfarvede, artsrene fugle. Det samme gælder de vildtfarvede unger, som jo kan være splitfugle. Dilute er en kostbar farvemutation hos Agapornis lilianae, og Dark Eyed Clear (Yellow) er måske ikke mindre kostbar, dels i kraft af sin sjældenhed, dels fordi det er en særdeles smuk fugl, der som nævnt har bibeholdt den vildtfarvede fugls røde ansigtsmaske med en gul fjerdragt, der har et skær af lysegrøn, hvilket får fuglen til at fremtræde nærmest lysende ”neongulgrøn”.
Jeg har tidligere besluttet mig for udelukkende at arbejde med den artsrene Lutino farvemutation hos Agapornis lilianae, så jeg agter ikke at arbejde videre med DEC (Yellow) farvemutationen, så hvis der er læsere af denne artikel, som seriøst ønsker målrettet at arbejdere videre med denne farvemutation, er man velkommen til at kontakte mig.
EN LÆSERREAKTION
Jeg modtager ofte spørgsmål m.v. fra www.birdkeeper.dk’s ’s efterhånden mange trofaste læsere, som jeg altid besvarer direkte over for afsenderen. Nu har ovennævnte lille artikel afstedkommet en reaktion fra en enkelt læser, hvor substansen undtagelsesvist berettiger til en besvarelse via www.birdkeeper.dk . Derfor har jeg valgt at publicere denne læsers henvendelse. Bortset fra at navnene på de i henvendelsen berørte personer er blevet anonymiseret, er der ikke foretaget nogen former for redaktionelle ændringer i læserens henvendelse, hverken indholdsmæssigt eller formmæssigt. Henvendelsen, der er fremsendt til www.birdkeeper.dk via to e-mails under overskriften ”Råd”, gengives derfor i sin originale og fulde ordlyd nedenfor:
E-mail fra læser:
”Hej Jørgen,
Det er med største beklagelse at jeg kan læse din artikel om "Jordbærhovedet" Dark Eyed Clear, som i øvrigt hedder Dark Eyed Yellow i grøn serie og kun betegnes DEC i grundformen, præcis som mørkfaktor er grundformen af D grøn og DD grøn.
Nu skal jeg forklare realiteternes sammenhæng i forhold til denne mutation. Først og fremmest så er DEC opstået hos rødhovedet dværgpapegøjer. Få år efter blev den ført over i jordbærhovedet, sodbrunhovedet og sorthovedet - jeg kender blandt andet manden som førte mutationen over til jordbærhovedet.
Jeg er fuldt informeret om hvad (navn på international mutationsekspert) svarede dig, og hvis du læser mellem linjerne, så blev det uinteressant efter at du forklarede fuglene var købt hos (navn på hollandsk opdrætter). Og hvorfor? Jo, for så er det en DEY, præcis som alle andre DEY i jordbærhovedet - nemlig transmutationer og hybrider. Stammede fuglene derimod fra en stamme, som en dansker havde haft i 20 år, så ville (navn på international mutationsekspert) have været interesseret, for så ville der have været en lille chance for at der var tale om en artsren NY mutation.
Nu er jeg ikke bekendt med hvorvidt du har besøgt (navn på hollandsk opdrætter) eller om du bare er uviden. Men hvis du bemærker det, så har (navn på hollandsk opdrætter) 80% transmutationer af jordbærhovedet - og gad vide hvor mange af de 10% grønne, som så er split til diverse transmutationer?
Sagen er den at op til flere mennesker har købt "rene" jordbærhovedet hos ham, men der er oftest falder blå og andet transmutationer. Vil du påstå at disse fugle så er artsrene også?
(Navn på hollandsk opdrætter) nævnte engang for mig og en bekendt, at han ikke ville garantere for split i hans fugle. Og at chancen måske var større for at de var split end de ikke var.
Bottom of line er at din DEY unge er en transmutation. (Navn på hollandsk opdrætter) har netop disse DEY, som er transmutationer. Med en vis realitetssans, tror du så at din DEY er en nyoptået mutation, når fuglene kommer fra (navn på hollandsk opdrætter) eller tror du nærmere du har fået 2 grønne, som har været blandet ind over hans andre trans DEY?
Kan du se det pudsige i at alle disse mutationer, opstår hos folk, som allerede har mutationen som transmutation?
Billederne af ungen illusterer jo også på det flotteste, at den er rød i nakken, hvilket for enhver kender ikke må finde sted på en artsren jordbærhovedet!
Ydermere opstår en ny mutation ALTID som en split fugl. Det udelukker at mutationen er spontant opstået hos dine fugle, og kan tidligst være opstået en generation tidligere, og dette forudsætter at dine to "artsrene" jordbærhovedet er søskende.
Ydermere skal du bemærke at 66% af DEY ungens søskende i teorien er split DEC - og det er jo katastrofalt hvis du har solgt disse fugle som grønne, når de i virkeligheden er mulig split DEY og dermed split transmutationer og også indeholder en vis procentdel af rødhovedet og måske andre arter. (Så vidt jeg husker blev DEC først ført over i sodbrunhovedet og derefter til jordbærhovedet)
Det er jo derfor katastrofalt at du sælger Jordbærhovedet som er split en transmutation. På den måde får andre folk disse fugle blandet i deres artsrene jordbærhovedet og de er dermed ødelagt. Du bidrager jo storartet til at ødelægge de artsrene bestande! Jeg håber du kan retfærdiggøre det!
Jeg ved du sikkert vil have svært ved at forholde dig til det, for det er jo absolut ikke hvad du selv mener - dog har jeg alligevel kendt (navn på hollandsk opdrætter) længere end du og kender lidt mere til realiteterne. Ydermere har jeg billeder af DEY jordbærhovedet fra september 2005 - gæt selv hvor fra ;-) Du bidrager storatet til at ødelægge artsrene jordbærhovedet og samtidigt skyder du sig selv i foden - Folk ved at du har fugle fra (navn på hollandsk opdrætter) og at der falder transmutationer af din stamme. Hvad gør du når der falder blå om nogle generationer og måske DEW fra samme stamme? Vil du så forklare at BÅDE den blå mutation og den DEC er opstået, samtidigt i dine "artsrene" fugle?
At du skriver denne artikel og har disse fugle, beviser jo også overfor andre at du ikke har gjort din research godt nok - ved at købe "artsrene" jordbæhovedet hos folk som har 80% transmutationer - eller også bare er useriøs
Nu kan uvidenhed ihvertfald ikke være en undskyldning!
Her ses en af (navn på hollandsk opdrætter)’s DEY - Mon ikke den er i familie med dine fugle? ;-)
(link til hollandsk opdrætters hjemmeside)
Best Regards,
(navn på afsender)”
Ovennævnte e-mail blev fulgt op af en foreløbig e-mail besvarelse fra www.birdkeeper.dk, der lød således:
”Hej
Tak for belæringen!
Bemærk venligst, at det af artiklen fremgår, at de to forældrefugle (der er de eneste 2 fugle, som jeg har fra den pågældende hollandske opdrætter) fremover isoleres, og ikke længere udgør en del af min artsrene vildtfarvede stamme, som alle i øvrigt stammer fra førende tyske opdrættere.
Mvh
Jørgen Petersen”
Dette afstedkom en ny e-mail fra læseren, der lød således:
”Hej,
Hvis du virkelig tog dette seriøst med artsrene fugle, så burde hverken den DEY eller mulig split søskende sælges. OG det bør påvises i artiklen at der er tale om en transmutation, som stammer fra Rødhovedet!
Og for din egen skyld, mht. at sælge fugle, så bør du nok bare slette artiklen, så folk ikke ved du har haft transmutationer
Jeg kan godt lide udtrykket "førende opdrætter" og specielt når det bruges om (navn på udenlandsk opdrætter) i sammenhæng med artrene jordbærhovedet - Ville det ikke være mere passende at fortælle hvilke folk du har fuglene fra? Alle kan påstå at have fugle fra førende opdrættere!”
KOMMENTAR TIL OVENNÆVNTE LÆSERREAKTION
Først skal det nævnes, at jeg aldrig har mødt og ikke kender den pågældende læser. Jeg er derfor meget overrasket over henvendelsens noget uforskammede og nærmest anklagende tone, men lad nu det ligge. Det er heldigvis ikke sådan, at jeg kender danske fugleholdere i almindelighed, hvor man som hovedregel møder en høflig og venlig omgangstone samt – ikke mindst – stor hjælpsomhed. Selvfølgelig kan fugleholdere være uenige med hinanden og mene, at en anden fugleholder er på ”tynd is” i et givent spørgsmål, men indtil nu har jeg – som allerede nævnt - altid kun mødt en høflig tone blandt danske fugleholdere, hvilket jo også giver det bedste grundlag for en åben og konstruktiv dialog.
Med hensyn til substansen i læserens henvendelse, så er det sjældent, at sandheden er så simpel, som læseren fremstiller det. Med tiden har jeg ydermere lært at tage mig i agt for mennesker, der mener at have ”patent på sandheden”, da denne ofte kan have flere ansigter.
Indledningsvis skal opmærksomheden henledes på, at ovennævnte artikel er publiceret under en ny rubrik på www.birdkeeper.dk, der hedder ”Andre emner”, som er tiltænkt små, ikke dybdeborende artikler om hverdagens pudsigheder i fugleholdet i modsætning til de artikler, som f.eks. publiceres under rubrikken om de enkelte fuglearter. Derfor er denne artikel heller ikke stort sat op, ligesom det heller ikke af artiklen fremgår, at jeg ”claimer” at have skabt – verdens – eller Danmarks første artsrene farvemutation af denne slags. Jeg har alene skrevet, at farvemutationen er dukket op efter vildtfarvede forældrefugle, jævnfør at den hollandske opdrætter – såvel mundtligt som skriftligt - har oplyst, at forældrefuglene også genotypemæssigt er artsrene, da der over en årrække udelukkende er fremavlet vildtfarvede unger fra de stammer, som de hidrører. Det har den hollandske opdrætter ved efterfølgende henvendelse på ny skriftligt bekræftet over for mig.
Jeg kan forstå, at læseren åbenbart har haft negative oplevelser med den pågældende hollandske opdrætter, da læseren omtaler denne i lidet flatterende vendinger. Det kan da godt være, at også jeg har været for godtroende over for denne opdrætter, og at jeg er blevet snydt. Det er så ikke første gang, og det bliver sikkert heller ikke den sidste gang, at en fugleholder snyder mig. Denne erfaring kan jeg jo så lægge oven i de erfaringer, som jeg tidligere har gjort med en lille håndfuld danske fugleholdere, der har specialiseret sig inden for dværgpapegøjer, og hvor de har lovet mere, end deres fugle har kunnet holde. I sådanne sammenhænge er det væsentligste vel at drage en konsekvens, lære af sine fejltagelser og skærpe sin agtpågivenhed. Det ville i øvrigt være glædeligt, hvis der var flere opdrættere af dværgpapegøjer, der drog de nødvendige konsekvenser omkring deres fugle, så vi f.eks. undgår at se fugle med ”dværgvækst” eller mutationsfugle med forpjusket fjerdragt udbudt til salg på www.fuglemarkedet.dk. Det gælder særligt i forhold til opdrættere, som gerne vil belære andre om, hvad der er rigtigt, og hvad der er forkert.
Når nu læseren peger fingre ad den hollandske opdrætter, så hører det samtidig med til sandheden, at samme hollandske opdrætter og hans fugle gennem årene ved gentagne lejligheder har vundet præmier for sine vildtfarvede Agapornis lilianae såvel ved nationale som ved internationale udstillinger (bl.a. ”Best in Show”). Jeg er endvidere bekendt med, at flere af den hollandske opdrætters fugle indgår i avlsmaterialet hos nogen af de tyske opdrættere, som flere danske dværgpapegøjeeksperter betragter som værende ”førende” opdrættere af artsrene Agapornis lilianae. Jeg har derudover noteret mig, at man på visse dværgpapegøjeeksperters hjemmesider i øvrigt ikke holder sig tilbage med at benytte informationer og fotos fra den pågældende hollandske opdrætter, så denne kan åbenbart godt bruges i andre sammenhænge, selv når vi taler om Agapornis lilianae.
Med hensyn til læserens synspunkt om det med at købe fugle ”… fra en stamme, som en dansker havde haft i 20 år …”, så har jeg også prøvet det før i andre sammenhænge, dog uden større held.
Det er desværre forbigået læserens opmærksomhed, at det allerede af ovennævnte artikel fremgår, at denne farvemutation oprindeligt er opstået hos Agapornis fischeri. Læseren kaster så nyt lys over dette ved at fortælle om, hvorledes denne farvemutation kunstigt skulle være skabt af en af læserens bekendte, hvad jeg på det skarpeste må tage afstand fra, at nogen gør (det er beklageligvis i mange sammenhænge blevet et værre ”rod” med farvemutationerne blandt dværgpapegøjearterne med hvid øjenring: Fischeri, lilianae, nigrigenis og personatus). Læseren har bestemt ret i, at de flere år gamle fotos af to mutationsfugle, som han henviser til på den hollandske opdrætters hjemmeside intet har med Agapornis lilianae at gøre. Det kan man forvisse sig om ved blot at studere den anatomiske fænotype, som slet ikke svarer til en Agapornis lilianae. Det kan ligeledes ses på størrelsen af de to fugles næb, overnæbbets kurve, samt ikke mindst farven på fuglenes overnæb, der tydeligt peger i retning af Agapornis fischeri, men den fugl, som jeg har opdrættet, ser heller ikke sådan ud. Den farvemutation, som jeg viser fotos af ovenfor er ikke, som anført af læseren, rød i nakken (og heller ikke på baghalsen), men dens røde ansigtsmaske fremtræder større end de vildtfarvedes, da den røde farve i ”udvasket” form strækker sig et stykke ind på den forreste del af baghovedet (øreområde og halssider). Her skal man imidlertid holde sig for øje, at mange vildtfarvede Agapornis lilianae (også i naturen) har områder af varierende størrelse med større eller mindre tæthed af røde fjer i baghovedets lys olivengrønne fjerområde, og det gælder også fugle i fangenskab, som kan ses hos Röder, Gölz, Bördner, Bätz, Andresen, Kindl, m.fl. Denne omstændighed fremtræder naturligvis meget tydeligere, når fuglens fjerdragt er gul. Noget andet er så, at man i forhold til udstillingsfugle selvfølgelig tilstræber at gøre de enkelte forskelligt farvede fjerområder på fuglen så ensfarvet og skarpt afgrænsede som overhovedet muligt.
Som allerede anført i ovennævnte artikel, så indgår såvel forældrepar som de vildtfarvede unger ikke længere i min stamme af artsrene vildtfarvede Agapornis lilianae, og de holdes isoleret. De er med andre ord blevet kasseret som avlsfugle, da de ikke lever op til de standarder, som jeg stiller til mit avlsmateriale, da de er købt som vildtfarvede både af fænotype som af genotype, men desværre holdt ”varedeklarationen” ikke. For så vidt angår ungfuglen, der er faldet ud som farvemutation, så kan det undre, at når jeg har fremsendt fotos af denne til bedømmelse hos vel en af verdens førende mutationseksperter blandt dværgpapegøjer, at vedkommende så ikke gør mig opmærksom på, at den måske kan være en transmutation, specielt fordi jeg i min henvendelse gjorde opmærksom på, at jeg har som mål udelukkende at have artsrene Agapornis lilianae – også af genotype - men selv den bedste kan jo åbenbart fejle.
Man kan selvfølgelig klandre mig for at have sat farvemutationen til salg, hvis jeg ikke var helt sikker på, at den er artsren, men her kan eventuelle interesserede købere jo – ud fra en ”alt andet lige”-betragtning - ved selvsyn konstatere, om de ”køber katten i sækken”, det kan man ikke med de vildtfarvede, hvorfor de heller ikke er blevet udbudt, men i stedet er blevet isoleret. Som følge heraf er farvemutationen derfor sat til salg på en måde, så eventuelle interesserede købere kan byde på den med den pris, som de synes, at den er værd. Jeg kræver ikke 500,- Euro (som p.t. er markedsprisen i Europa for Dilute farvemutationen af Agapornis lilianae), selv om der med rette også kan stilles spørgsmålstegn ved, om denne farvemutation reelt er artsren, eftersom den først opstod hos Agapornis nigrigenis (og jo, jeg kender godt hele historien med MUTAVI og opdrætteren fra Niedernhausen); men hvad er egentligt alternativet? Skal fuglen, som er sund og rask, aflives fordi der er nogen, som ikke mener, at den er artsren? Det er ellers det, som jeg altid gør ved fugle, som måtte vise det mindste tegn på degeneration eller permanent svækkelse.
Læseren virker øjensynligt ivrig efter at beklikke min moral, men foreslår samtidig – højst overraskende – at ”Og for din egen skyld, mht. at sælge fugle, så bør du nok bare slette artiklen, så folk ikke ved du har haft transmutationer”, hvilket jeg dog aldrig kunne drømme om. Jeg håber så sandelig ikke, at det er den måde, hvorpå seriøse, specialiserede dværgpapegøjeopdrættere agerer, da den slags fortielser kan gøre mere skade end gavn, og man jo helst skal kunne lære af hinandens fejltagelser. Jeg står ved det, som jeg har skrevet, og jeg er ikke bange for at indrømme, hvis jeg har taget fejl, men læseren burde have læst, hvad jeg har skrevet i artiklen, og ikke hvad han tror – eller mener - at jeg har skrevet.
Konklusionen er, at jeg naturligvis ikke under nogen omstændigheder går ind for transmutationer. Da der ikke må kunne rettes mistanke om, at mine artsrene vildtfarvede Agapornis lilianae ikke – også genotypemæssigt – er artsrene, så vil jeg afslutningsvis på ny gentage, at jeg har kasseret de to vildtfarvede fugle (incl. deres vildtfarvede afkom), der stammer fra den pågældende hollandske opdrætter, som avlsmateriale.
Min stamme af artsrene vildtfarvede Agapornis lilianae stammer herefter udelukkende fra førende tyske opdrættere, og eventuelle købere af ungfugle får ved et køb – om ønsket – oplyst, hvorfra forældrefuglene stammer, ligesom man kan få stamkort på fuglen.
Jørgen Petersen
Konciperet/Opdateret: 14.07.2011/16.01.2016
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About the Blue-naped Parrot (Tanygnathus lucionensis)
A story about determining the right subspecies
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My first encounter with the Tanygnathus genus
Already when I was a teenager back at the beginning of the 1970's, you could occasionally see some very special parrot species at one of the large bird traders in Copenhagen (Denmark), who were known for continuously importing many parrots from the various parrot continents. They were smaller medium to medium sized green parrots with a beautiful mosaic pattern on their wings, which is caused by the different colored wing coverts are being broadly marked with orange-yellow edges (in most of the subspecies) and with an impressive, disproportionately large red beak compared to the rest of the bird. These birds later turned out to be Tanygnathus lucionensis and Tanygnathus megalorynchos, and I remember that on the few occasions I saw them, it was usually just a single bird in the cage tucked away over in a corner of the shop premises, possibly because they were mistakenly included in a shipment from Asia along with a number of other far more popular parrot species.
At this time, nobody really knew anything about these birds, and at the same time they did not seem to have much interest among aviculturists. This has since changed quite a bit because nowadays many aviculturists are fascinated by these parrots.
But what is it that makes parrots from the Tanygnathus genus so fascinating?
Photo 01:
Tanygnathus lucionensis lucionensis: The scientific Latin species name "lucionensis" means coming from Luzon, the largest island in the Philippines. This is the nominate subspecies coming from the islands of Luzon and Mindore in the northern parts of the Philippines. The beautiful photo clearly shows the upper side of the nominate subspecies which is characterized by it is having a blue/bluish mantle, back, lower back and upper rump. Photo: Forest Botial-Jarvis-Bataan, Philippines-Macaulay Library ML560592651.
Brief introduction to the whole Tanygnathus genus
Before we delve into the substance and take a closer look at the main focus of this article, namely the determination of the Tanygnathus lucionensis subspecies, here is an overall and very short introduction to the entire Tanygnathus genus:
The Tanygnathus genus represents a group of parrots with predominantly green plumage that are smaller medium to medium sized birds with large - in several instances - very large, heavy mainly red beak (hence the Latin scientific designation, “Tanygnathus”, that means extended, long and beak/jaw, is well-deserved) and a proportionately short, wedge-shaped rounded tail, which is somewhat stepped and is shorter than their wings, giving them - according to the world-renowned Australian ornithologist Joseph M. Forshaw - a “top-heavy” look. There is no prominent notch in the upper mandible and the cere is naked. Sexual dimorphism is slight or absent, and young birds generally appear duller than adults.
The premise of this article is the world's leading, current nomenclature/taxonomy, “THE HOWARD AND MOORE COMPLETE CHECKLIST OF THE BIRDS OF THE WORLD”, version 4 from 2013 and newest version 4.1 from August 2018, ”Errata and Corrigenda to Volume 1”, (used by the world's leading scientists, researchers, ornithologists, curators, etc.) mentions the following species and subspecies belonging to the Tanygnathus genus:
- Great-billed Parrot, Tanygnatus megalorynchos (nominate subspecies + 4 subspecies)
Status in the wild according to BirdLife International: “Least Concern”.
- Blue-naped Parrot, Tanygnathus lucionensis (nominate subspecies + 4 subspecies)
Status in the wild according to BirdLife International: “Near Threatened”.
- Blue-backed Parrot, Tanygnathus sumatranus (nominate subspecies + 4 subspecies)
Status in the wild according to BirdLife International: “Least Concern”, except from the everetti subspecies, they are “Endangered”.
- Black-lored Parrot, Tanygnathus gramineus (nominate subspecies).
Status in the wild according to BirdLife International: “Vulnerable”.
The members of the Tanygnatus genus are closely related to the Eclectus Parrots (the Eclectus genus). However, the most Tanygnathus species are much smaller and are less heavily built than the Eclectus Parrots and thus more elegant. Just as you see with members of the Eclectus genus, Tanygnathus females are also known to be quite aggressive towards males, but in fact some Tanygnathus males can also be aggressive towards females. It can even become so violently that the female's toes can be bitten off. As with the Eclectus Parrots, there is only limited interaction between the sexes in daily life and mutual preening is not something that I yet have experienced in the Tanygnathus species that I have kept for some years.
Genetic evidence has also supported close relationship to the Psittacula genus as it looked like up until 2019. For example, there are many similarities between Tanygnathus megalorhynchus and Psittacula eupatria magnirostris (nowadays Palaeornis eupatria magnirostris, in english Andaman Alexandrine Parakeet); if one abstracts from the fact that the former has a short tail and the latter has a long tail, just try to compare the enormous and amazing beaks of both birds.
This genus is native to Southeast Asia and Melanesia. The overall distribution area is mainly the Philippines, New Guinea, the Moluccas and Sulawesi (the world's 11th largest island, also called Celebes).
In nature, their food mainly consists of fruits (e.g., mangoes), seeds, berries, nuts and insects. Sometimes their food also consists of crops e.g., corn.
What particularly fascinates me about this genus is their disproportionately large beak, which in the vast majority of cases is large and red and thus very prominent, you can't help but focus precisely on it when you look at the bird. It cannot be said that the members of the genus Tanygnathus are brightly colored, but most species/subspecies have an incredibly beautiful mosaic pattern on their wings, which is caused by the different colored wing coverts are being broadly marked with orange-yellow edges (in most of the subspecies). Although some of the birds may appear a little compact, they are very agile and move incredibly elegantly in the branches of the trees.
Kept in human care, these birds appear very shy at first, but gradually they become calmer and, in some cases, they can become completely comfortable with human contact.
None of the four different Tanygnatus species have ever been common within the aviculture, which may be surprising, as they are rather quiet and low-voiced birds that you can become familiar with over time. Having said that, Tanygnathus lucionensis is the "most frequently" occurring species among aviculturists, whereas Tanygnatus megalorynchos and Tanygnathus sumatranus are seen even less often. Very remarkably, Tanygnathus lucionensis has the reverse status in nature where it has become a fragile species with a status of being "Near Threatened". BirdLife International has estimated that there are only 1,500 - 7,000 individuals left in the wild of this species with associated subspecies. Besides, the population development is also decreasing mainly due to logging of trees in its habitats. Neither Tanygnatus megalorynchos nor Tanygnathus sumatranus is nearly threatened in the wild, fortunately they are of the least concern. It is therefore very paradoxical that Tanygnathus lucionensis is the most widespread species among aviculturists in Europe.
Photo 02:
Tanygnathus megalorhynchos sumbensis: This photo shows a subspecies of the biggest species belonging to the Tanygnathus genus, the Great-billed Parrot (Tanygnatus megalorynchos) which also have the largest and most impressive beak of these species. Tanygnatus megalorhynchos sumbensis, comes from the island of Sumba (Lesser Sundas). Photo: Mehd Halaouate.
Lack of reliable knowledge about the Tanygnathus genus
One thing is to have a scientifically worked-out taxonomy that lists and divides the Tanygnathus genus into species and subspecies distributed by geographical distribution areas, another thing is to find reliable sources (field studies, literature, photos, etc.) that describe all the members of this genus in detail and accurately. I have many parrot books, encyclopedias, etc., but I have never managed to find a book with accompanying photos that in a credible manner in detail describe all the various Tanygnathus species with its associated subspecies. At best, this genus is all too often referred to be only peripherally described in these books. Moreover, a number of these descriptions are only superficial, and it is of no use if you have to determine the subspecies of a species that has a number of very comparable subspecies (cf. later). The different parrot books contain almost no photos where one can really compare all the subspecies and see the differences between these. Up until now I haven't been able to find a book or another source of sufficient credibility and accuracy.
With this article, I will try to contribute to creating a little more clarification in relation to some of Tanygnathus lucionensis' subspecies, and that is the focus for the rest of this article. At the same time, it must be emphasized that the present article predominantly deals with taxonomic and morphological issues in order to try to determinate the right subspecies of the Tanygnathus lucionensis that I keep, to which comes some general information about the species in the wild. However, the article does not deal with topics such as keeping, feeding and breeding of Tanygnathus lucionensis in human custody.
A little about Tanygnathus lucionensis in the wild
Very summary, this is a smaller medium sized parrot, around 31 cm in length, primarily green except for a light blue rear crown and nape, pale blue lower back and rump (cf. subspecies later), shoulders with broad orange-yellow edges on black wing coverts, and blackish underwings with green underwing coverts.
As already mentioned, this species is listed as “Near Threatened” by BirdLife International because there are some indications that it has a moderately small, fragmented population, and it may be undergoing a continuing decline due to habitat loss (logging) and trapping. However, little is still known about the population size, population structure and threats to this species.
Tanygnathus lucionensis is present throughout the Philippines, where there are records from at least 45 islands, plus the Talaud Islands, Indonesia, and islands off north-east Borneo belonging to Malaysia (e.g., Kota Kinabalu, which is a very popular photo spot for tourists interested in this species) and it is therefore not a country endemic species.
It was common on most islands in the Philippines a century or less ago, but has suffered declines since on such a scale that it is now rare or extinct on many islands. However, it does survive in small pockets of habitat on the smaller islands, so that its status overall is difficult for BirdLife International to assess. Moreover, it is still fairly numerous in some areas of Palawan and on Tawi-Tawi, and high numbers should be present in a large tract of forest on Talaud. Intensive habitat loss and trapping have made this species scarce on most islands except Mindoro and Palawan, but still a local animal protection organization has raised concerns over the increasing illegal trade of this bird on Palawan.
It also occurs in urban areas such as several national parks within the Philippines: Bataan, Quezon and Minalungaw.
As previously stated, BirdLife International's current estimate of the number of Tanygnathus lucionensis (incl. subspecies) is 1,500 - 7,000 mature individuals, while the population development is described as declining owing to habitat degradation from agricultural expansion and logging pressures to which comes illegal trapping for the cagebird trade. It is a bird of closed and open forest formations, including secondary forests, coconut and banana plantations and mangrove, chiefly in lowland and coastal areas, up to 1,000 m. It is usually found in flocks of up to 12 individuals which roost communally and make regular dawn and dusk flights between feeding and roosting areas. Breeding takes place in a hole in a tree in from April till July.
Photo 03:
Tanygnathus lucionensis lucionensis: When you see photos of these birds from the nature, you most often see them sitting in the tall tree crowns where they prefer to be. Although some of the birds may appear a little compact, they are very agile and move incredibly elegantly in the branches of the trees. Photo: Stephan Lorenz-Bataan, Philippines-Macaulay Library ML563667891.
The scientifically recognized subspecies of Tanygnathus lucionensis
“THE HOWARD AND MOORE COMPLETE CHECKLIST OF THE BIRDS OF THE WORLD” (see above) recognizes the following subspecies of Tanygnathus lucionensis:
Note to the above table:
I am fully aware that in the spring of 2023, Arndt-Verlag has issued a new - and final - complete version of the "Namensliste der Papageienarten und Unterarten" (Latin, German and English names). It states the existence of - in relation to Arndt-Verlag's poster with the Tanygnathus genus (“Großschnabelpapageien”) - four "other" Tanygnathus lucionensis subspecies, namely nigrorum, siquijorensis, koikei und paraguenus, without these being further described. These four 4 "other" Tanygnathus lucionensis subspecies are not recognized today by the leading scientific taxonomy, and the deviations that the designation of these subspecies has expressed in its time are today simply considered variance within the framework of the currently recognized subspecies. They are thus assimilated into the current range of subspecies.
So, these four "other" Tanygnathus lucionensis subspecies are ignored here, as the article is based on the world's leading taxonomy, which is based on solid scientific evidence as the basis for the division into species and subspecies (for example, the subspecies, siquijorensis, was in its time solely determined from only a single holotype specimen).
All of the four "other" subspecies mentioned by Arndt-Verlag, koikei and paraguenus, as well as nigrorum and siquijorensis, were all already mentioned as subspecies in the world's first large complete parrot book, called "Papegøjebogen" (in English "The Parrot Book"), which was written by the Dane, J. L Albrecht-Møller, with the assistance of another Dane, Aage V. Nielsen. J. L. Albrecht-Møller was approximately 30 years to write "The Parrot Book", which was completely published in 1973. Unfortunately, the book is only available in Danish and consists of almost 700 densely written pages spread over 3 volumes as well as a completely extra 4th volume filled with color drawings of a large number of species and subspecies of parrots of all kinds.
In fact, it was a third Dane, an internationally highly respected scientist, Finn Salomonsen (zoologist and ornithologist), who first described the subspecies nigrorum and siquijorensi. During an expedition to the Philippines in the years 1951 - 1952, he also did some research on this genus.
As mentioned, none of the above four "other" subspecies have found grace for inclusion in Howard and Moore's taxonomy. Nor does the world's second major scientific "heavyweighter" within bird taxonomy, "The Clements Checklist of Birds of the World", 6th Edition, that was published and released by Cornell University Press in June 2007 take these four "other" subspecies into account.
Photo 04:
Tanygnathus lucionensis lucionensis: As a nest these birds use a hole in a tree where they during April - July are breeding. The nest is often found in secondary forest, at forest edges and in plantations at elevations of up to 1000 m. Photo: Bradley Hacker-Bataan, Philippines-Macaulay Library ML214490541.
My first purchases of Tanygnathus lucionensis did not go as hoped
From my first encounter with this genus back in the early 1970's, it was always in the back of my mind that when the right opportunity presented itself, I would like to acquire such birds, but almost a lifetime should pass before thoughts turned into action in autumn 2018. Here I acquired my first pair of Tanygnathus lucionensis from a foreign breeder who had guaranteed me a 100 % perfect and unrelated pair. As he himself only had one breeding pair, he had procured an unrelated female bird via another aviculturist in a neighboring country. The breeder informed me that the birds were of the subspecies Tanygnathus lucionensis talautensis, which, compared to the nominate subspecies, that has a blue/bluish mantle, back, lower back and upper rump, instead has a pure green plumage in the same places. He further stated that it was the subspecies that was found most among aviculturists in Europe. After driving many hundreds of kilometers to collect the birds, it unfortunately turned out that the breeder's own male bird - in contrary to what he had otherwise promised - was not 100 % perfect, as it was basically missing half the length of the tail, which I had not been informed about before my departure from Denmark. Since I had driven so far, and because it was a rather rare bird, I chose, after consultation with my wife, who went along on the trip, to bring both birds home to Denmark, but my disappointment with this seller, who, after all, several times had guaranteed that both birds were 100 % in order, was great. At home in Denmark, the birds were placed in an approximately 6-week long quarantine period and different clinical disease testings were conducted both via PCR and serology, and all test results were negative for ABV/PDD, APV, PBFD, and CPS, etc. Already during the quarantine period, I had observed that the male bird, which unfortunately was hand-reared, had an abnormal behavior. Besides, the fact that it had a habit of plucking its own feathers, it was obviously also mentally disturbed, which resulted in highly unusual behaviour, where it, among other things, sat in the same place around the clock without moving, and it seemed almost terrified of e.g., natural branches, to which was added the fact that it had absolutely no interaction with the female bird. I contacted the seller to return the bird, but he refused to take it back, so as the bird's condition further deteriorated, in consultation with a veterinarian specialized in bird diseases, it was decided to euthanize the bird, so my first attempt at acquiring a pair of this species ended in failure. The female was subsequently sold to another aviculturist who was missing a female bird, as I was of the opinion that it probably would be easier to buy a new pair together.
I had not given up on my dream of keeping this species, but next time the acquisition should be made from a much more serious and experienced breeder of this species. During my search for such a breeder, I sometimes came across other aviculturists who also mentioned that the subspecies Tanygnathus lucionensis talautensis is the kind that is most widespread among European aviculturists.
In autumn 2021 - after being registered with a new breeder for nearly 1 year in order to be allowed to buy a pair - I ended up buying a new pair. This breeder sold his birds just as being Tanygnathus lucionensis i.e., without being subspecies determined, but it was clear that even these newly acquired birds did not have the features known for the nominate subspecies in the form of a blue/bluish mantle, back, lower back and upper rump. Once again, these feather areas were completely green on the birds (as they also were on the two pairs of parent birds), so it had to be the subspecies Tanygnathus lucionensis talautensis. These birds came from an aviculturist who generally maintains a very high level of hygiene and besides has a bird collection that has been clinically tested for the common parrot diseases. Even so, I always also have newly purchased birds re-tested for diseases in connection with the 6-week quarantine period during which they are physically isolated. All the various tests turned out to be negative, but already a few days into the quarantine period the male still seemed to be a bit lethargic and he sneezed once in a while. So, once again he had to be examined by a veterinarian specialized in bird diseases, who took renewed samples from the bird. After laboratory analysis it turned out that the bird had a special rod bacterium that caused sinusitis, so it was put on a penicillin cure with a targeted antibiotic, but it didn't help, the bird got worse and had to remain in quarantine. Another two cures of other and more extensive penicillin preparations over several weeks (with an intermediate period of rebuilding the intestinal flora in the stomach) took place, but nothing helped, it was a chronic sinusitis, and as the bird's condition now was really bad, it also had to be euthanized without at any point having left the quarantine station for several months. The female bird, which is a big beautiful bird in top condition, had no symptoms at any time (sinusitis is not contagious), so this time I decided to keep the surviving female bird.
In 2022 I had the opportunity to buy several young birds from different breeding pairs from the same breeder, who gave me a price reduction on one of the new birds, because I had lost the male that I had bought from him the year before. All these birds came well throughout the quarantine period and besides the fact that they all seem very vital, they also have a very natural behavior, and I have to say that they really make use of their large beaks to gnaw on the many fresh (and unsprayed/uncontaminated) natural branches with which they continuously are supplied. The birds are all, without exception, completely green in the plumage on the mantle, back, lower back and upper rump, and therefore - once again - it just had to be the subspecies Tanygnathus lucionensis talautensis, cf. the information I had received from the various breeders I had spoken to around Europe. Besides, the birds also visually corresponded to a very lifelike drawing in Joseph M. Forshaw's magnificent book, “Parrots of the World” (1st edition, 1973), on page 189, where there is an absolutely excellent color drawing of Tanygnathus lucionensis talautensis made by the outstanding illustrator, the late William T. Cooper (the drawing shows an adult male only with a blue nape (rest of the head is green) and with completely green mantle, back, lower back and upper rump).
The doubt about which subspecies arises
From 2018, I - as several other European aviculturists probably also have heard - were told the story that the subspecies we today have in human care in Europe mostly are the Tanygnathus lucionensis talautensis subspecies, but over time I became more and more uncertain whether this was true.
After acquiring my birds, I later on bought the poster, “Großschnabelpapageien”, from Arndt-Verlag (Thomas Arndt) containing “all” the Tanygnathus species and subspecies, where a pair of Tanygnathus lucionensis talautensis (see photo below) is illustrated with almost completely blue heads in contrast to the adult specimen of this species shown with only a clearly defined blue nape in the color drawing in "Parrots of the World" mentioned above (though Joseph M Forshaw mentions that “blue on crown and occiput variable”, which implies the possibility of a certain form of variance).
Photo 05:
Tanygnathus lucionensis talautensis: This photo shows an extract from Arndt-Verlag's poster, “Großschnabelpapageien”, where a male and female of this subspecies are illustrated with almost completely blue heads in contrast to the adult specimen of this species shown with only a clearly defined blue nape in the color drawing in Joseph M. Forshaw’s book, "Parrots of the World".
I was thereafter wondering if it was possible to find a trustworthy and competent person, who actually had been on the Talaud islands and seen how Tanygnathus lucionensis talautensis looks like in wildlife, then it once and for all could be discovered whether the birds that I and other European aviculturists have bought in reality are of this species, or maybe a completely different one.
I then remembered that I during the COVID19-crisis was invited to attend in a Zoom meeting on Wednesday, 22nd September 2021 organized by The Avicultural Society of Australia. Here Mr. Mehd Halaouate held a presentation on the topic "Challenges and Rewards of a mixed Collection". It was an extremely interesting presentation, which included some absolutely stunning photos of wildlife birds from Indonesia including Papua. In many cases the presentation also contained photos of parrot species that we - the European aviculturists - only can dream of and read about in books. During this presentation Mehd Halaouate also showed some photos of birds from the Talaud Islands where he had followed the natural bird life.
In November 2021 I therefore contacted Mehd Halaouate, and asked him, if he during his visits to the Talaud Islands had observed the Tanygnathus lucionensis subspecies and maybe even had taken any photos of this subspecies during his stay. Mehd Halaouate got back to me and stated that he actually had observed Tanygnathus lucionensis talautensis in its natural habitat and also had taken photos of the birds even though he didn't get many since it was challenging to find them and they weren't kept as pets on these islands. I was completely overwhelmed to see Mehd Halaouate’s photos of these birds from the wild and below you can see a couple of these photos of which one actually shows that a big part of the upper head of this subspecies is blue, not just the crown (nape or neck patch). According to Mehd Halaouate most of the birds in the Talaud Islands have heads where almost all the upper parts are clearly blue, and those birds whose heads not almost were entirely blue appeared to be uncolored fledging juveniles as he were there during the breeding season, August and September.
Photo 06
Tanygnathus lucionensis talautensis: This is a photo of an adult, fully colored bird taken by Mehd Halaouate during one of his two trips to Krakelong which is one of the islands that make up the Talaud Islands. Mehd Halaouate was there doing some conservation work for the Red-and-blue lory (Eos histrio).
Photo 07
Tanygnathus lucionensis talautensis: This is also a photo taken on Krakelong Island that shows that the intensity of the blue coloration on the head was not present in all birds. According to Mehd Halaouate it was probably because he was there during August and September which is the breeding season where he encountered many fledging juvenile birds.
Renewed contact with Mehd Halaouate
Time passed and I couldn't help thinking that now that my Tanygnathus lucionensis cannot be of the subspecies talautensis, what kind of subspecies is it then?
In the intervening period I had of course done my homework and made my own research and had come to the conclusion that my birds could probably be Tanygnathus lucionenis salvadorii, which, like Tanygnathus lucionensis talautensis, is the only other (described) subspecies - approved by Howard and Moore - which has a complete green mantle, back, lower back and upper rump.
This subspecies also appears in Arndt-Verlag's poster, “Großschnabelpapageien”, and is shown in the photo below.
Photo 08
Tanygnathus lucionensis salvadorii: This photo shows an extract from Arndt-Verlag's poster, “Großschnabelpapageien”. Apart from Tanygnathus lucionensis talautensis, this is the only other subspecies - recognized by Howard and Moore - which has a complete green mantle, back, lower back and upper rump.
So, in order to get a second opinion and be quite sure about the subspecies determination I decided to contact Mehd Halaouate again to ask him what subspecies he would judge my Tanygnathus lucionensis to be. I sent him various available color descriptions of the relevant subspecies as well as - not least - photos of my birds, all of which can be seen excerpted below.
Descriptions of the Tanygnathus lucionensis subspecies
As you know, the world's leading current nomenclature/taxonomy, “THE HOWARD AND MOORE COMPLETE CHECKLIST OF THE BIRDS OF THE WORLD” mentions up to 4 subspecies (hybridus, talautensis, salvadorii and horrisonus) in addition to the nominate subspecies, but unfortunately this work does not contain any descriptions of the individual subspecies. Instead, one has to look in different zoological museums around the world to find stuffed birds of the so-called "holotype specimens" for each subspecies, and this is quite an unmanageable task. I therefore had to find other trustworthy sources that contain color descriptions of the various subspecies:
Source 1 for color description: Joseph M. Forshaw
As already mentioned, it is very unfortunate that there is no credible, scientifically evidence-based literature covering the entire Tanygnathus genus, with correct and detailed descriptions of each subspecies. In the absence of this, I instead rely on the Australian ornithologist Joseph M. Forshaw's impressive book “Parrots of the World”, which however, only mentions 2 subspecies (hybridus and talautensis) besides the nominate subspecies, but the description of the two subspecies here is unfortunately not adequate. However, in the original edition of this book (1st edition, 1973), on page 189, there is an absolutely excellent color drawing of Tanygnathus lucionensis talautensis made by the outstanding illustrator, the late William T. Cooper (an adult male only with a blue nape (not on the rest of the head) and completely green mantle, back, lower back and rump).
Source 2 for color description: Thomas Arndt (Arndt-Verlag)
In the well-known "Lexicon of Parrots" (version 3.0), Thomas Arndt mentions the same two subspecies as mentioned by Joseph M. Forshaw (hybridus and talautensis).
However, in his poster, “Großschnabelpapageien”, containing species and subspecies from the Tanygnathus genus, Thomas Arndt shows both the nominate subspecies of Tanygnathus lucionensis and 3 subspecies (hybridus, talautensis and a “new” one, namely salvadorii). If one looks closer at this poster from Thomas Arndt (see above), he has illustrated Tanygnathus lucionensis talautensis - both the male and the female - with almost completely blue heads in contrast to the color drawing in "Parrots of the World" (also mentioned above) that shows an adult Tanygnatus lucionensis talautensis with only a blue nape patch and not a blue head. This corresponds to the photos Mehd Halaouate himself took of adult birds of this subspecies during his two visits to the Talaud Islands.
However, and very interesting, on the same poster from Thomas Arndt, he also displays the subspecies Tanygnatus lucionensis salvadorii that in particular deserves attention. This subspecies is shown with only a blue nape and completely green back and rump (and looks very much like the Tanygnatus lucionensis talautensis, that is shown in Joseph M. Forshaw’s book mentioned above).
Source 3 for color description: World Parrot Trust
What is very remarkable is that the World Parrot Trust, on its website - like Joseph M. Forshaw - only mentions the subspecies hybridus and talautensis, but when one read further in the text under the actual description of the two subspecies, World Parrot Trust actually also describes salvadorii under the description of talautensis (they mention that the two different subspecies look the same). How this is possible, I can't quite see through.
Summary overview of visual differences between the individual subspecies
Since there is no adequate and sufficient information on the sizes (length and weight) of the individual subspecies, only selected visual special characteristics for the plumage (color differences) of the individual Tanygnatus lucionensis subspecies are given below:
Note to the above table:
How the fifth subspecies - Tanygnathus lucionensis horrisonus, mentioned by Howard and Moore - looks like, I do not know in details. However, if you read “PEABODY MUSEUM OF NATURAL HISTORY, YALE UNIVERSITY BULLETIN 13, “Notes on a Collection of Birds from Mindoro Island, Philippines” by S. Dillon Ripley (Peabody Museum of Natural History, Yale University) and D. S. Rabor (Biology Department, Silliman University), which was published 31st December 1958 (New Haven, Connecticut), you can read on page 36, that the authors after carefully studies consider “horrisonus” as synonyms of “lucionensis”, which means that it must have blue mantle, back, lower back and upper rump, and my birds don't have these hallmarks. According to the newest version of Howard and Moore “horrisonus” is still recognized as an independent subspecies.
I therefore assume that my birds must be either Tanygnathus lucionensis talautensis or Tanygnathus lucionensis salvadorii, as both of these subspecies have green backs and green upper rumps.
Personally, I strongly believe that my birds are Tanygnathus lucionensis salvadorii, as I have seen the various adult parents of the birds that I have bought and none of them have a nearly completely upper blue head, but only a blue patch on the nape.
Furthermore, my birds don’t have any blue coloration - nor bluish tinge - on the mantle, back, lower back and the upper rump, and to my knowledge, both the nominate subspecies, Tanygnathus lucionensis lucionensis, and the subspecies, Tanygnathus lucionensis hybridus, clearly have these hallmarks.
I rule out that my birds are crossed with other subspecies, as they have no blue at all on the back or rump, nor do they have more than a clearly defined blue nape patch.
Some of the photo documentations sent to Mehd Halaouate
I sent several photos of my birds to Mehd Halaouate and some them are showed below. All my birds are from last year (2022), except from the bird in front on photo 09 and 13, this bird is from 2021.
The photos of my birds are unfortunately not of the best quality, as they were taken with the zoom-function on my mobile phone and have become somewhat grainy. I should of course also have captured some of the birds and taken photos of them from the front and from the back with spread wings, but since these birds live in aviaries close to some other parrot species that already have laid and are incubating eggs, it was unfortunately not possible to take some better photos for the near future. Here are some photos of my birds:
Photo 09 Photo 10
Tanygnathus lucionensis salvadorii / (Mantanani Blue-naped Parrot) Tanygnathus lucionensis salvadorii / (Mantanani Blue-naped Parrot)
Photo 11 Photo 12
Tanygnathus lucionensis salvadorii / (Mantanani Blue-naped Parrot) Tanygnathus lucionensis salvadorii / (Mantanani Blue-naped Parrot)
Photo 13 Photo 14
Tanygnathus lucionensis salvadorii / (Mantanani Blue-naped Parrot) Tanygnathus lucionensis salvadorii / (Mantanani Blue-naped Parrot)
Mehd Halaouate's assessment
After having read the above descriptions and studied the forwarded photos of my birds, Mehd Halaouate commented that my birds looked stunning and very healthy and furthermore mentioned that in his opinion they look more like Tanygnathus lucionensis salvadorii. At the same time, one must of course bear in mind that there are color variations among birds in the wild too that can make establishing the right distribution of the bird pretty impossible.
However, according to Mehd Halaouate most of the subspecies that were kept during his time as breeder in Europe, they were coming from Mr. Antonio de Dios in the Philippines (owner of “Birds International Inc.”, a large private parrot breeding farm in the Philippines), and they mostly were Tanygnathus lucionensis salvadorii. The for many aviculturists well-known Antonio de Dios exported a huge number of unique species to Europe especially to Holland and Belgium. Some of the other species he sent were species like Fig parrots, a big number of lories and lorikeet species, Great-billed parrots (Tanygnatus megalorynchos) and Moluccan king parrot subspecies.
Mehd Halaouate also mentioned that he had to search for some of his earlier photos of the Tanygnathus lucionensis talautensis to definitively prove how the adult birds of this subspecies looks like in wildlife, some truly unique photos, a few of which can be seen below. It is photos of a pet bird taken at a bird trader in Sulawesi (since the local people in Talaud Islands don’t keep this bird as a pet) and it does INDEED have intensive blue head covering all over the upperparts of the head and even around the eyes.
Photo 15
Tanygnathus lucionensis talautensis: I have never seen anything like it. This amazing close-up photo shows an adult and fully colored Tanygnathus lucionensis talautensis. The photo clearly shows how most adult birds of this subspecies that live in the wild on the Talaud islands look like i.e., where the blue plumage does not just form a clearly defined neck spot, but instead is spread over most of the upper part of the whole the head. Young birds do not have the same distribution of the blue color in the head. It is a pet bird that sits with a bird dealer on the island of Sulawesi. Photo: Mehd Halaouate.
Photo 16
Tanygnathus lucionensis talautensis: This equally amazing close-up photo shows the above pet bird of Tanygnathus lucionensis talautensis, just seen from a different angle. For some reason, the local inhabitants of the Talaud Islands do not keep this species as a pet bird, so this individual is photographed on the island of Sulawesi, which is located southwest of the Talaud Islands. The Talaud islands actually make up the area that is called North Sulawesi. Photo: Mehd Halaouate.
According to Mehd Halaouate the poster, “Großschnabelpapageien”, from Arndt-Verlag with the color drawing of Tanygnathus lucionensis talautensis is a bit exaggerated with the blue coloration of the head, throat and neck. Mehd Halaouate have never seen any bird with that much blue on the head.
Unexpected challenges in rewilding Tanygnathus parrots
During my dialogue with Mehd Halaouate, he also mentioned the following - for me highly surprising - problem, which is linked to the rewilding of the Tanygnathus parrots, which has been confiscated as a result of smuggling:
A factor which will make things even worse for establishing “the right ID” of many parrots in the wild in the near future is the fact that the forestry department in Indonesia does not have sufficient knowledge about differentiating between subspecies and in some cases even species. They tend to release confiscated parrots from the illegal trade in the wrong distribution area (habitat). As a former manager in World Parrot Trust Mehd Halaouate has had to stop a few of these releases because the parrots did not belong in specific islands they were meant to be released at. The authorities, unfortunately, had managed to do the damage thus these actions will cause the inter- or cross-breeding between the subspecies which will result in new colour variations. The worst result of this is that some subspecies in the nature will lose their purity.
This is an angle that I have not thought of before, and the authorities in the affected countries simply have to try to find a sustainable solution to the problem, so that before rewilding takes place, quality assurance must always be carried out to ensure that the birds are belonging to the birds' original distribution area (habitat), which presupposes a further educational and competence-related upgrade of the authorities' employees.
Also from this perspective, it is very important that we - the serious aviculturists (breeders) - are trying as much as possible to keep our birds pure as these hopefully one day will assist the wild populations. According to Mehd Halaouate the pace in which the illegal trapping and the wildlife trade is proceeding right now, many parrot species, for their survival, will rely on the captive populations, so we - the aviculturists (breeders) - must act responsible, professional and only work with pure birds at the subspecies levels.
Final remarks
I have on earlier occasions tried to initiate a dialogue about the issue of subspecies determination of this genus with some other European aviculturists who keep these birds, but up until now it had seemed that no one really was interested in getting to the bottom of this issue, so they generally just call their birds for Blue-naped Parrots (Tanygnatus lucionensis). I always try to keep my different parrots pure at the subspecies level (except from monotypic taxon) and I always only breed specimens of the same subspecies with each other, and I would strongly encourage other responsible breeders to do the same.
This was the story of not always believing everything you hear from other aviculturists/breeders. It is good to have a healthy skepticism and to try to form your own opinion about things. So, the next time I hear an aviculturist/breeder saying that the subspecies we have the most of in Europe is Tanygnathus lucionensis talautensis, I can now for sure say that it is not true and instead tell them a completely different story.
I hope that interested readers have found pleasure in reading this article about an exciting parrot species that there is rarely written many lines about in parrot books and in avicultural magazines.
A great thank you to Mehd Halaouate for having contributed to this article with several unique photos and detailed information about the subspecies of Tanygnathus lucionensis.
Best regards,
Jørgen Petersen
www.birdkeeper.dk
DENMARK
Photo 17
Tanygnathus lucionensis talautensis: I could not resist ending up with showing this close-up profile photo of the magnificent pet bird of this subspecies. I just keep on turning back to study the photos of this very special subspecies with a nearly completely blue head. Photo: Mehd Halaouate.
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