Greater Vasa Parrot
Coracopsis vasa
Large black parrot that is found in and around all types of forest. Often seen in flight, sometimes in small, loose flocks. Incredibly loud calls consist of rough squawks and low whistles. Can be very hard to separate from Lesser Vasa Parrot, but larger and bigger-billed, with a straight edge to the skin at the back of the bill. Vocalizations are lower-pitched and rougher than those of Lesser Vasa Parrot. Can easily be mistaken for a raptor in flight, but has all-black plumage unlike any raptor in range.
识别特征
The greater vasa parrot's breeding season is uncertain, but is probably between October and December. It has a very unusual breeding biology and mating system; females are 25% larger than males, and are, physically, dominant. The species lives in loose, polygynandrous groups wherein each female has at least 3-8 sexual partners. The males have re-evolved a phallus, and copulations can last up to 90 minutes. Copulations come in two lengths—short (1–3 seconds) and long durations (averaging 36 minutes), with the latter involving a copulatory tie. A copulatory tie usually applies to mammals, such as canids and felids, where the two animals are unable to physically part during mating due to the swelling, and structure, of the penis within the female's body (being barbed or lined with small "hooks" in some species). During brooding and chick-rearing, females shed their head feathers and develop bright orange skin coloration, and also sing complex songs from perches close to the nest. These serve to attract males to approach and regurgitate food, which the female accepts while off the nest. The females also defend a territory around their nest from other females during this period.
分类信息
The bird was first described in 1812 by George Shaw. There are three subspecies:<p>The bird is placed in the genus Mascarinus by some authorities.
- 学名
- Coracopsis vasa
- 命名信息
- (Shaw, 1812)
- 目
- Psittaciformes
- 科
- Psittaculidae
- 属
- Coracopsis
分布与栖息地
- 迁徙
- Resident species
行为
Migration pattern: Resident species.
保护状况
Population trend: declining.
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Chinese Shortwing
Brachypteryx sinensis
Shy and skulky ground-dweller of hill forests with dense undergrowth; especially favors damp, dark areas near streams, fallen trunks, and accumulated debris. Male is slate-blue, with paler undertail and lower belly; also note his thin white eyebrow. Female is dark dirt-brown, with paler underparts and a faint rufous eyering. Difficult to see in tangled understory, but can be readily detected through the male’s song, a series of pure, short whistles followed by a quick jumble of notes, which sometimes include a buzz. Calls include a “tchik” and a rattling series.
Rufous-webbed Bush-Tyrant
Cnemarchus rufipennis
Sizeable gray flycatcher of high-elevation scrub and forest edge habitats. Sometimes found in Polylepis. Ashy gray with white vent. It gets its name from the reddish brown coloration on its wings and tail feathers, often hidden when perched but easily visible in flight. Found singly or in pairs. Perches upright on the tops of bushes, snags, and rocks, dropping down to catch prey it spots; often hovers. Its call is a weak high-pitched “tree” whistle.
Cinereous Ground-Tyrant
Muscisaxicola cinereus
Rather plain but “gentle-faced” and attractive, this small terrestrial flycatcher breeds locally in the high Andes, with southern populations migrating north in winter. Favors rocky slopes, valleys, and adjacent bogs, where it mixes readily with other ground-tyrant species. Head and back plain blue-gray with a short weak whitish eyebrow, no colored cap markings, and an “average” straight bill (droop-tipped on Rufous-naped Ground-Tyrant). Also note no strong contrast between gray back and wings.
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