Vasa parrot | |
---|---|
Lesser vasa parrot | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Psittaciformes |
Family: | Psittaculidae |
Subfamily: | Psittrichasinae |
Genus: | Coracopsis Wagler, 1832 |
Type species | |
Psittacus niger (lesser vasa parrot) Linnaeus, 1758 | |
Species | |
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]
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]
The genus contains four species: [5]
Common name | Scientific name and subspecies | Range | Size and ecology | IUCN status and estimated population |
---|---|---|---|---|
Greater vasa parrot | Coracopsis vasa (Shaw, 1812) Three subspecies
| Madagascar and the Comoros. | Size: Habitat: Diet: | LC |
Lesser vasa parrot or Black parrot | Coracopsis nigra (Linnaeus, 1758) Two subspecies
| 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 |
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:
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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]
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.
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.
The family Psittacidae or holotropical parrots is one of three families of true parrots. It comprises the 12 species of subfamily Psittacinae and 167 of subfamily Arinae including several species that have gone extinct in recent centuries. Some of the most iconic birds in the world are represented here, such as the blue-and-yellow macaw among the New World parrots and the grey parrot among the Afrotropical parrots.
The true parrots are about 350 species of hook-billed, mostly herbivorous birds forming the superfamily Psittacoidea, one of the three superfamilies in the biological order Psittaciformes (parrots). True parrots are widespread, with species in Mexico, Central and South America, sub-Saharan Africa, India, Southeast Asia, Australia, and eastwards across the Pacific Ocean as far as Polynesia. The true parrots include many of the familiar parrots including macaws, conures, lorikeets, eclectus, Amazon parrots, grey parrot, and budgerigar. Most true parrots are colourful and flighted, with a few notable exceptions.
Newton's parakeet, also known as the Rodrigues parakeet or Rodrigues ring-necked parakeet, is an extinct species of parrot that was endemic to the Mascarene island of Rodrigues in the western Indian Ocean. Several of its features diverged from related species, indicating long-term isolation on Rodrigues and subsequent adaptation. The rose-ringed parakeet of the same genus is a close relative and probable ancestor. Newton's parakeet may itself have been ancestral to the endemic parakeets of nearby Mauritius and Réunion.
Psittacula, also known as Afro-Asian ring-necked parrots, is a genus of parrots from Africa and Southeast Asia. It is a widespread group with a clear concentration of species in south Asia, but also with representatives in Africa and the islands of the Indian Ocean. This is the only genus of parrot which has the majority of its species in continental Asia. Of all the extant species only Psittacula calthropae, Psittacula caniceps and Psittacula echo do not have a representative subspecies in any part of mainland continental Asia. The rose-ringed parakeet, Psittacula krameri, is one of the most widely distributed of all parrots.
The blue-winged parakeet, also known as the Malabar parakeet is a species of parakeet endemic to the Western Ghats of southern India. Found in small flocks, they fly rapidly in forest clearings while making screeching calls that differ from those of other parakeet species within their distribution range. Their long blue tails tipped in yellow and the dark wings with blue contrast with the dull grey of their head and body. Adult males and females can be easily told apart from the colour of their beak.
Lord Derby's parakeet, also known as Derbyan parakeet, is a parrot species, which is confined to a small pocket of moist evergreen forest in the hills and mountains of the Indian states of Arunachal Pradesh and Assam, and adjoining parts of Tibet, Sichuan and Yunnan in China. The species suffers from cutting of old trees and poaching for the illegal wildlife trade. In 2011, its status was updated from least concern to near threatened on the IUCN Red List. The adult male and female are easily distinguished because they have different beak colours and slightly different plumage.
The greater vasa parrot is one of two species of vasa parrot, the other being the lesser vasa parrot. The greater vasa parrot can be found throughout Madagascar and the Comoros.
The lesser vasa parrot or black parrot is a black coloured parrot endemic to most of Madagascar. It is one of four species of vasa parrots, the others being the greater vasa parrot, the Seychelles black parrot, and the Comoros black parrot. The latter two were formerly considered conspecific with the lesser vasa parrot.
The Seychelles parakeet or Seychelles Island parrot is an extinct species of parrot that was endemic to the Seychelles in the Indian Ocean. It was scientifically named Palaeornis wardi by the British ornithologist Edward Newton in 1867, and the specific name honours the British civil commissioner Swinburne Ward who procured the specimens that formed the basis for the description. It was found on the islands of Mahé, Silhouette, and possibly Praslin. Ten skin specimens exist today, but no skeletons. Though the species was later moved to the genus Psittacula, genetic studies have led some researchers to suggest it should belong in a reinstated Palaeornis along with the closely related Alexandrine parakeet (P. eupatria) of Asia.
Baudin's black cockatoo, also known as Baudin's cockatoo or the long-billed black cockatoo, is a species of genus Zanda found in southwest Australia. The epithet commemorates the French explorer Nicolas Baudin. It has a short crest on the top of its head, and the plumage is mostly greyish black. It has prominent white cheek patches and a white tail band. The body feathers are edged with white giving a scalloped appearance. Adult males have a dark grey beak and pink eye-rings. Adult females have a bone coloured beak, grey eye-rings and ear patches that are paler than those of the males.
Described by French naturalist Anselme Gaëtan Desmarest in 1826, the genus Calyptorhynchus has two species of cockatoos. They are all mostly black in colour, and the taxa may be differentiated partly by size and partly by small areas of red, grey, and yellow plumage, especially in the tail feathers. Studies based on the mitochondrial DNA 12S gene fragment suggested that other sexually dichromatic species, the gang-gang cockatoo and the cockatiel may be the closest living relatives of Calyptorhynchus. However, subsequent studies, including more genes confirm the morphological taxonomy with the gang-gang cockatoo most closely related to the galah, within the white cockatoo group, and with the cockatiel as a third distinct subfamily of cockatoos.
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The Mascarene parrot or mascarin is an extinct species of parrot that was endemic to the Mascarene island of Réunion in the western Indian Ocean. The taxonomic relationships of this species have been subject to debate; it has historically been grouped with either the Psittaculini parrots or the vasa parrots, with the latest genetic study favouring the former group.
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The Mascarene grey parakeet, Mauritius grey parrot, or Thirioux's grey parrot, is an extinct species of parrot which was endemic to the Mascarene Islands of Mauritius and Réunion in the western Indian Ocean. It has been classified as a member of the tribe Psittaculini, along with other parrots from the Islands.
Psittrichasiidae is a family of birds belonging to the superfamily of the true parrots (Psittacoidea). It is a very small family, the smallest of the three families of the true parrots. It is divided into two subfamilies: Psittrichasinae and Coracopsinae, that contain a single genus each. The first contains a single species, native to New Guinea, and the second contains four living species distributed throughout Madagascar and other islands of the Indian Ocean.
The Comoros black parrot is a medium-sized parrot endemic to the Comoros. Historically, it has been treated as a subspecies of the lesser vasa parrot, although it shows morphological, ecological and behavioural differences. It was split as a distinct species by the IOC in 2021.