Sumba green pigeon
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Sumba green pigeon ( Treron teysmannii ) |
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| Schlegel , 1879 |
The Sumba green pigeon ( Treron teysmannii ), also spelled Teysmann pigeon, is a species of pigeon birds. It is an endemic species of the Lesser Sunda Islands .
Like many species whose distribution is limited to a few islands, the Sumba green pigeon is also potentially endangered. The population situation of the thick-billed green pigeon is indicated by the IUCN as near threatened .
Appearance
The Sumba green pigeon reaches a body length of 29 centimeters. It is a medium-sized, compactly built pigeon that is slightly larger than a laughing pigeon . The tail accounts for between 7.9 and 9.4 centimeters. The beak is between 1.6 and 1.7 inches long. The sexual dimorphism is less pronounced than in many other species from the genus of green pigeons.
In the male, the forehead and the reins are lime green and merge into a darker gray olive on the crown and neck. The upper coat is dark olive green, the rest of the coat is matt dark red-brown. The small wing-coverts are bright olive-green, the middle wing-coverts are matt olive-colored and the feathers are lined with broad sulfur-yellow on the outer lobes. The large elytra are black with narrow yellow edges. The wings are black with fine pale yellow hems, the wings are black with fine white hems. The back to the upper tail-coverts is bright gold-green, the middle tail feathers are dark olive-green, the outer feathers are gray with a black middle transverse band.
The chin and throat are bright green-yellow, the tone of the plumage turns into a darker olive green on the ear covers, neck and chest. The belly is lighter and more yellowish than the chest. The under tail coverts are creamy white with an individually different proportion of dark green. The featherless eye ring is comparatively large and greenish-yellow in color. The beak looks very short because the wax skin is densely feathered. is greenish gray and lightens to the tip of the beak in a yellowish to white-greenish tone. The feet and legs are dull red.
The females largely correspond to the males in their body plumage, but the coat is not red. The yellow feather edges of the wing-coverts are paler, those of the middle wing-coverts are almost white. The young birds are similar to the female, but the feathers are even paler.
Possible confusion
In the distribution area of the Sumba green pigeon, the black-necked fruit pigeon , which belongs to the downy pigeons, is also present. On Sumba it is the only other species of pigeon that also has green plumage. It is significantly smaller than the Sumba green pigeon and the black transverse band is missing in both sexes. The male has a gray head and a black neck.
Distribution area
The Sumba Green Pigeon is an island end with the Lesser Sunda Islands , a group of islands in the Malay Archipelago . The Sumba green pigeon is found exclusively on Sumba , an 11,150 km² island that belongs to the Indonesian province of East Nusa Tenggara . The island is traversed in a west-east direction by an approximately 150 km long and up to 40 km wide region with mountains, which divides the climate into two areas. In the south-west half of the year, with up to 1,600 mm, more rain falls than in the drier north-east, where precipitation is sometimes less than 600 mm per year. The Sumba green pigeon occurs all over the island in regions where there is still sufficient forest. However, Sumba has been deforested for decades and this also creates the threat of this species.
Way of life
The Sumba green pigeon can be observed mostly in pairs or in small groups with up to 20,000 individuals. The food spectrum includes fruits and berries, both of which are picked directly from the branches. While eating, the pigeon behaves comparatively aggressively and chases other pigeons out of the tree. Sundastare ( Aplonis minor ) are also driven away by the Sumba pigeon. Little is known about the reproductive biology of this species.
literature
- David Gibbs, Eustace Barnes and John Cox: Pigeons and Doves - A Guide to the Pigeons and Doves of the World . Pica Press, Sussex 2001, ISBN 90-74345-26-3
- Gerhard Rösler: The wild pigeons of the earth - free living, keeping and breeding . M. & H. Schaper Verlag, Alfeld-Hannover 1996, ISBN 3-7944-0184-0
Web links
- Treron teysmannii in the endangered Red List species the IUCN 2012. Posted by: BirdLife International, 2012. Accessed November 12, 2016th
- Call of the Sumba Green Dove on Xeno-Canto
Individual evidence
- ↑ a b Treron teysmannii in the endangered Red List species the IUCN 2012. Posted by: BirdLife International, 2012. Accessed November 12, 2016th
- ^ Gibbs, Barnes and Cox: Pigeons and Doves , p. 439.
- ↑ a b Gibbs, Barnes and Cox: Pigeons and Doves , p. 438.