Coracopsis

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Cladus: Sarcopterygii
Cladus: Rhipidistia
Cladus: Tetrapodomorpha
Cladus: Eotetrapodiformes
Cladus: Elpistostegalia
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Classis: Reptilia
Cladus: Eureptilia
Cladus: Romeriida
Subclassis: Diapsida
Cladus: Sauria
Infraclassis: Archosauromorpha
Cladus: Crurotarsi
Cladus: Archosauria
Cladus: Avemetatarsalia
Cladus: Ornithodira
Cladus: Dinosauromorpha
Cladus: Dinosauriformes
Cladus: Dracohors
Cladus: Dinosauria
Cladus: Saurischia
Cladus: Eusaurischia
Subordo: Theropoda
Cladus: Neotheropoda
Cladus: Averostra
Cladus: Tetanurae
Cladus: Avetheropoda
Cladus: Coelurosauria
Cladus: Tyrannoraptora
Cladus: Maniraptoromorpha
Cladus: Maniraptoriformes
Cladus: Maniraptora
Cladus: Pennaraptora
Cladus: Paraves
Cladus: Eumaniraptora
Cladus: Avialae
Classis/Infraclassis: Aves
Cladus: Avebrevicauda
Cladus: Pygostylia
Cladus: Ornithothoraces
Cladus: Ornithuromorpha
Cladus: Carinatae
Subclassis/Parvclassis: Neornithes
Infraclassis/Cohors: Neognathae
Cladus: Neoaves
Cladus: Telluraves
Cladus: Australaves
Ordo: Psittaciformes

Familia: Psittaculidae
Genus: Coracopsis
Species: C. barklyi – C. nigra – C. vasa

Name

Coracopsis Wagler, 1832

Typus: Psittacus niger Linnaeus, 1758, = Coracopsis nigra

References

Wagler, J.G. 1832. Monographia Psittacorum. pp. 469–750, pl. 22–27 BHL. In: Abhandlungen der Mathematisch-Physikalischen Classe der Koeniglisch Bayerischen Akademie der Wissenschaften 1, München. Tittle page BHL DOI: 10.5962/bhl.title.51953 Reference page. p. 501 BHL.

Vernacular names
Deutsch: Vasapapageien
English: Vasa Parrots
فارسی: طوطی وازا
suomi: Mustakaijat
кырык мары: Ваза попугай
Bahasa Melayu: Parrot Vasa
norsk: Vasapapegøyer
svenska: Vasapapegojor

The vasa parrots that form the genus Coracopsis are four species of parrot in the Old World parrot family Psittaculidae that are endemic to Madagascar and other islands in the western Indian Ocean. Some taxonomists formerly placed the species in the genus in Mascarinus, but this is now thought to be based on the results of a heavily flawed, later-debunked genetic study.[1]
Taxonomy

The genus Coracopsis was introduced in 1832 by the German ornithologist Johann Georg Wagler.[2] The type species was designated as the lesser vasa parrot by George Robert Gray in 1840.[3][4]
Species

The genus contains four species:[5]

Genus Coracopsis – Linnaeus, 1758 – four species

Common name	Scientific name and subspecies	Range	Size and ecology	IUCN status and estimated population
Greater vasa parrot	Coracopsis vasa (Shaw, 1812) Three subspecies Coracopsis vasa comorensis, (Peters, W, 1854) Coracopsis vasa drouhardi, Lavauden, 1929 Coracopsis vasa vasa, (Shaw, 1812)	Madagascar and the Comoros.	Size: Habitat: Diet:	LC

Lesser vasa parrot or Black parrot	Coracopsis nigra (Linnaeus, 1758) Two subspecies Coracopsis nigra libs, Bangs, 1927 Coracopsis nigra nigra, (Linnaeus, 1758)	Madagascar	Size: Habitat: Diet:	LC

Comoros black parrot[6]	Coracopsis sibilans (Milne-Edwards & Oustalet, 1885)	the Comoros	Size: Habitat: Diet:	NT
Seychelles black parrot	Coracopsis barklyi Newton, 1867	the Seychelles	Size: Habitat: Diet:	VU

Phylogeny

A 2011 genetic study found the Mascarene parrot from Réunion to be nested among the subspecies of the lesser vasa parrot from Madagascar and nearby islands, and therefore not related to the Psittacula parrots. It also found that the Mascarene parrot line diverged 4.6 to 9 million years ago, prior to the formation of Réunion, indicating this must have happened elsewhere.[7] The cladogram accompanying the study is shown below:

Another group of scientists later acknowledged the finding, but pointed out that the sample might have been damaged, and that further testing was needed before the issue could be fully resolved. They also noted that if Mascarinus was confirmed to be embedded within the genus Coracopsis, the latter would become a junior synonym, since the former name is older.[8] Hume has expressed surprise by these findings, due to the anatomical similarities between the Mascarene parrot and other parrots from the islands that are believed to be psittaculines.[9] However, a later study found that the placement of Mascarinus within Coracopsis was likely a result of cross-contamination of genetic material during the study, debunking this placement, and supporting them as being two distinct, unrelated genera within different subfamilies.[10]
Description

They are notable in the parrot world for their peculiar appearance, which includes extremely truncated bodies with long necks, black to grey feathers and a pink beak.

The skin of both female and male vasas turns yellow during the breeding season, and there is often feather loss. However, in females the feather loss can result in complete baldness. Another interesting feature of the females breeding physiology is when her feathers, which are usually black to grey, turn brown without a moult. This is caused by the redistribution of melanin, which is the pigment that makes the vasas' feathers black.
Unusual characteristics

In addition to their appearance they possess aspects of their physiology that make them unique amongst parrots. Vasa chicks are known to hatch after only 18–20 days of incubation, which is highly irregular as parrots of the vasa size range tend to take up to 30 days to hatch.

The male vasas' cloaca is able to evert into a hemipenis, which becomes erect during mating – a feature unique to the genus. This phallus is associated with prolonged matings enforced by a copulatory tie[clarification needed].[11] Baby vasas possess pads on their beaks which when stimulated prompt a strong feeding response. These pads disappear after only a few weeks, however the feeding or 'weaning' reflex remains unusually strong well into adulthood. Often aviculturalists have to use a syringe to force food into the crops of young vasas as the intensity of the weaning reflex prevents them from being spoon fed.

Vasa parrots infected with the debilitating psittacine beak and feather disease are known to turn white, which, during the 1970s when the first wave of birds were exported into Europe and America, resulted in them being mistakenly advertised by importers as albinos.
References
Wikimedia Commons has media related to Coracopsis.

Kundu, S., C.G. Jones, R.P. Prys-Jones, and J.J. Groombridge. 2012. The evolution of the Indian Ocean parrots (Psittaciformes): extinction, adaptive radiation and eustacy. Molecular Phylogenetics and Evolution 62: 296–305.

Podsiadlowski, Lars; Gamauf, Anita; Töpfer, Till (February 2017). "Revising the phylogenetic position of the extinct Mascarene Parrot Mascarinus mascarin (Linnaeus 1771) (Aves: Psittaciformes: Psittacidae)". Molecular Phylogenetics and Evolution. 107: 499–502. doi:10.1016/j.ympev.2016.12.022. ISSN 1095-9513. PMID 28017858.
Wagler, Johann Georg (1832). "Monographia Psittacorum". Abhandlungen der mathematisch-physikalischen Classe, Königlich-Bayerische Akademie der Wissenschaften. 1: 463–750 [501].
Gray, George Robert (1840). A List of the Genera of Birds : with an Indication of the Typical Species of Each Genus. London: R. and J.E. Taylor. p. 50.
Peters, James Lee, ed. (1937). Check-List of Birds of the World. Vol. 3. Cambridge, Massachusetts: Harvard University Press. p. 229.
Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (July 2021). "Parrots, cockatoos". IOC World Bird List Version 11.2. International Ornithologists' Union. Retrieved 3 September 2021.
"Comoro Parrot (Coracopsis sibilans) - BirdLife species factsheet". Archived from the original on 2015-01-29.
Kundu, S.; Jones, C. G.; Prys-Jones, R. P.; Groombridge, J. J. (2011). "The evolution of the Indian Ocean parrots (Psittaciformes): Extinction, adaptive radiation and eustacy". Molecular Phylogenetics and Evolution. 62 (1): 296–305. doi:10.1016/j.ympev.2011.09.025. PMID 22019932.
Joseph, L.; Toon, A.; Schirtzinger, E. E.; Wright, T. F.; Schodde, R. (2012). "A revised nomenclature and classification for family-group taxa of parrots (Psittaciformes)". Zootaxa. 3205. 3205: 26–40. doi:10.11646/zootaxa.3205.1.2.
Hume, J. P.; Walters, M. (2012). Extinct Birds. London: A & C Black. pp. 177–178. ISBN 978-1-4081-5725-1.
Podsiadlowski, Lars; Gamauf, Anita; Töpfer, Till (February 2017). "Revising the phylogenetic position of the extinct Mascarene Parrot Mascarinus mascarin (Linnaeus 1771) (Aves: Psittaciformes: Psittacidae)". Molecular Phylogenetics and Evolution. 107: 499–502. doi:10.1016/j.ympev.2016.12.022. ISSN 1095-9513. PMID 28017858.
Ekstrom, J. M. M.; Burke, T.; Randrianaina, L.; Birkhead, T. R. (2007-01-22). "Unusual sex roles in a highly promiscuous parrot: the Greater Vasa Parrot Caracopsis vasa". Ibis. 149 (2). Wiley: 313–320. doi:10.1111/j.1474-919X.2006.00632.x.