Pale-vented Bush-hen
Amaurornis moluccana
Very secretive medium-sized rail that inhabits dense vegetation around wetland habitats in northern and northeastern Australia. Rarely seen away from cover. Dull gray-blue body, brown wings and tail, with reddish-brown undertail, yellow-green bill with small shield, and long yellow legs. Gives a variety of calls, usually a loud, repeated, squawky "wark-wark-wark" or an agitated "wark-woop, wark-woop, wark-woop."
识别特征
The pale-vented bush-hen is medium sized with a body length between 25 and 30 cm (9.8 and 11.8 in), wing length of 140 to 155 mm (5.5 to 6.1 in), bill length of 28 to 33 mm (1.1 to 1.3 in) and weighing between 150 and 210 grams (5.3 and 7.4 oz). It has a dull gray-blue body, brown wings and tail. Its eponymous pale coloured vent and undertail are variously described as buff-ruffous, rufous-brown, buff or reddish-brown.<p>The bill is distinctive being lime green with an orange red frontal shield when breeding and duller green with no red when not breeding. The legs are olive-yellow and the eye dark. There is no apparent difference between sexes. Juveniles are paler in colour.
分类信息
The pale-vented bush-hen is a member of the Rallidae family which includes crakes and rails. The genus name Amaurornis (Reichenbach 1853) is from the Greek for dark, shadowy or dim, amauros, and bird, ornis.<p>The species name Amaurornis moluccana (Wallace, 1865) means "Moluccan dark and shadowy bird" and relates its original discovery in the Moluccan Islands, Indonesia. The term pale-vented came into use in the late 1990s as a descriptive term, when the species of bush hens in Australia and New Guinea were separated from the Plain Bush-hen (A. olivaceus) endemic to the Philippines.<p>It is widely known in Australia as simply "bush-hen" but has also been known as rufous-tailed or rufous-vented rail, crake or moorhen or brown rail. Gould believed he had found a new species, Gallinula ruficrissa in 1869 giving it the common name of rufous-vented gallinule.
- 学名
- Amaurornis moluccana
- 命名信息
- (Wallace, 1865)
- 目
- Gruiformes
- 科
- Rallidae
- 属
- Amaurornis
分布与栖息地
- 迁徙
- Resident species
行为
The pale-vented bush-hen is a shy and secretive bird best seen at dawn, dusk or when overcast. It is found in low, dense vegetation on the edge of water courses or wetlands. The bird is best detected by its loud, distinctive calls which include clucks and clicks, shrieks or wails.<p>The bird is found in Australia, the Moluccan Islands, New Guinea, the Bismarck Archipelago and the Solomon Islands. In Australia it is found mostly in coastal and subcoastal regions from the Top End of the Northern Territory and Cape York Peninsula south through eastern Queensland to north-eastern NSW. They appear to be scarce in the Top End of the Northern Territory and in the Kimberly region of Western Australia.<p>The IUCN Red List identifies its conservation status as Least Concern. Its conservation status in New South Wales is listed as Vulnerable, in the Northern Territory as Near Threatened and in Queensland as Least Concern.
保护状况
- 种群趋势
- unknown
照片
分布
鸟叫声
其他鸟类
Gray-headed Greenbul
Phyllastrephus poliocephalus
A large and relatively colorful greenbul of the mountains of Cameroon and southeastern Nigeria. Note the gray head, olive-green back and tail, yellow belly, and white throat. Found in humid forest at middle elevations. A conspicuous species that is usually found in noisy flocks. Larger and more colorful than other greenbuls in its restricted range. Gives nasal, barking calls which often accelerate into a quick series.
Yellowhammer
Emberiza citrinella
Male distinctive, with bright yellow head, yellowish underparts. Female is drab and streaky, usually with yellowish wash to face, and often found with bright males. Note bright rusty rump. White outer tail feathers flash in flight. A species of heathland, forest clearings, and farmland with hedges. Male sings from a prominent perch, giving a dry and uninspired “dzidzidzidzidzi.” Forms flocks in winter, feeding mainly on ground in search of seeds. A native of Eurasia, introduced to New Zealand and a few adjacent islands.
Yellow-spotted Bush Sparrow
Gymnoris pyrgita
A large, remarkably nondescript sparrow of dry country. Note the pale bill, the white eye-ring, the gray-brown back, the paler underparts, and the white throat. The small yellow throat spot is difficult to see. Found in dry thorn savanna, woodland, and lightly cultivated areas, often in small groups. Similar to Sahel Bush Sparrow, but lacks a distinctive eyebrow mark. Also similar to Pale Rockfinch, but has less patterning on the wing and a clearly defined white throat. The calls are cheerful chirps, often given in a quick series.
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