Black-billed Cuckoo-Dove
Macropygia nigrirostris
A small-bodied, mostly brown dove with a long tail and a short stout black bill. Heavily barred tail and rump are diagnostic. Found from sea level to 2600 meters of elevation, usually singly or in pairs at forest edge, though groups of up to 20 can sometimes be found feeding on fruiting trees. Very similar to both Brown Cuckoo-Dove in New Guinea and MacKinlay’s Cuckoo-Dove in the Solomon Islands. Male Brown Cuckoo-Dove differs in being bigger with a grayish head and iridescent green neck patch, female has thick black under tail crescents. MacKinlay’s Cuckoo-Dove is a similar size but is a lighter tan color on the body showing contrast with the darker chestnut wings, whereas Black-billed Cuckoo-Dove is uniformly ruddy brown. It also differs from both species in its barred uppertail and rump. Commonly vocal and most often heard giving a rapid series of around twelve “woi” notes.
识别特征
The bar-tailed cuckoo-dove measures 29 centimetres (11 in) in length. It has a short, completely black bill. The six central tail feathers are black barred. The central breast feathers are not bifurcated. The male is ruddy-brown, with no clear distinction between the underparts and the upperparts. The female, however, has black barred upperparts. The juvenile is similar to the female, but its tail is barred irregularly.<p>It is differentiated from other sympatric (other species existing in the same geographic area and thus frequently encountering with it) pigeons other than cuckoo-doves, by its chestnut brown plumage and slender, long tail.
分类信息
- 学名
- Macropygia nigrirostris
- 命名信息
- Salvadori, 1876
- 目
- Columbiformes
- 科
- Columbidae
- 属
- Macropygia
分布与栖息地
It is native to Papua New Guinea and Indonesia. It inhabits old-growth forests, forest peripheries, and second-growth forests. It also occurs commonly on submontane forests on altitudes of up to 2,600 metres (8,500 ft) from sea levels, and occasionally at sea levels on hills adjacent to coasts.
- 迁徙
- Resident species
保护状况
Since 1988, the bar-tailed cuckoo-dove has been rated as a species of least concern on the IUCN Red List of Endangered Species. This is because it has a very large range—more than 20,000 km2 (7,700 mi2)—and because it has a stable population trend. Also, although its population numbers has not been determined, it is commonly found throughout most of its distribution, it is thought to be above 10,000 which is above the criterion to warrant it a vulnerable rating. There are no substantial threats thought to be to this species.
- 种群趋势
- stable
照片
分布
其他鸟类
Semicollared Hawk
Microspizias collaris
Tiny, rare hawk of mid-elevation cloud forest. Black upperparts and crown are separated by white band on back of neck, which can be indistinct and hard to see in the field. Underparts are white with broad, dark barring; also note dark comma-shaped blotch on side of neck. Immatures are tinged brown or rusty, with tan or buff neck band. Easily mistaken for Tiny Hawk, which occurs mainly at lower elevations; Semicollared has broader and more diffuse bars on underparts and more prominent neck markings. Typically stays inside forest, hunting small birds; occasionally soars.
Dark-rumped Swift
Apus acuticauda
A rare and highly range-restricted dark swift lacking any white on the lower back. Underparts can have a white-fringed appearance, but may sometimes appear uniform due to wear. Note contrast between belly and solid black undertail. Combination of namesake dark rump and dark face distinguishes this species from other similar “fork-tailed swifts.” Breeds in damp forested hills with waterfalls, steep cliffs, and ledges; forages over other habitats as well. Gives high, thin calls, as well as chittery trilling screams.
Yellow Bittern
Botaurus sinensis
Very small heron of marshy, well-vegetated water bodies. Adult pale orangish brown or yellow, depending on the light, with a narrow dark cap. Juvenile darker above with pale feather edges. Can be inconspicuous in dense vegetation, but frequently makes short flights; on flying birds, note dark flight feathers contrasting with pale yellowish wing coverts. Typically quiet, but occasionally gives harsh grating calls when flushed.
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