Little Brown Bustard
Heterotetrax humilis
A small and relatively short-necked bustard. The male has a black-and-gray pattern on the head, while the female is plainer, but with abundant white spotting. Both sexes show a white belly. A white bar across the wing is conspicuous in flight. Found in dry savanna, shrubland, and semi-desert habitats. Often in pairs. Smaller than other bustards in its range. Somewhat like Buff-crested Bustard, but has a white rather than black belly.
识别特征
The smallest species in its genus, the little brown bustard reaches a maximum length of about 45 cm (18 in). They are light brown birds with whitish underparts. The male has a black tuft on the nape, and a black throat speckled with white. The female lacks these black areas, instead having heavy buff spotting on the back, wings and breast. Both male and female have dark flight feathers on the wings, and when flying show a slender white wing-bar, which divides the black feathers from the sandy-brown wing coverts. The female white-bellied bustard (Eupodotis senegalensis), which has a wider range, is larger and darker and has bluish-grey colouring on the back of the neck. The call of the little brown bustard is uttered with the neck outstretched and the head thrown back and is a high-pitched, rattling sound.
分类信息
Genus: Heterotetrax; Family: Otididae; Order: Otidiformes.
- 学名
- Heterotetrax humilis
- 命名信息
- (Blyth, 1855)
- 目
- Otidiformes
- 科
- Otididae
- 属
- Heterotetrax
分布与栖息地
The little brown bustard is endemic to the Horn of Africa, where its range includes southern and eastern Ethiopia and northern and central Somalia. Its typical habitat is dry scrub and open thornbush, and it sometimes moves out onto tussocky plains. It occurs at altitudes of up to 1,500 m (5,000 ft).
- 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
其他鸟类
Cundinamarca Antpitta
Grallaria kaestneri
A rather plain antpitta known only from a small area of Colombia’s eastern Andes, southeast of Bogotá. Plumage is dull brown with small white streaks on the underparts, a slightly paler belly, and a faint eyering. Distinguished from Tawny Antpitta by its much darker plumage, streaked (not scaled) underparts, and habitat preferences. Inhabits cloud forest understory, and mostly stays on the ground, though may come up to a low perch to sing. Song is three short whistles that ascend slightly in pitch.
Greater Ani
Crotophaga major
Anis are bizarre black cuckoos with long floppy tails and unique, very deep and broad-sided bills. Greater is the largest ani, distinctive with its staring yellow eye and glossy blue, green, and purple sheen on the wings and tail. Always associated with water; especially apt to be found low in the forest edge around slow-moving rivers and lakes. Seen in family groups. Widespread in lowlands from Panama to Argentina.
Greater Sage-Grouse
Centrocercus urophasianus
Large turkeylike bird found in extensive areas of sagebrush. Both sexes gray overall with very fine patterning, black belly, and long pointed tail. Males have a white breast and a black throat. Spectacular male display involves fanning tail, inflating yellow air sacs on chest, and thrusting them forward to produce liquid popping noises. Most easily seen at display sites in early spring; can be very inconspicuous at other times of year. Population in severe decline due to habitat destruction. Extremely similar to the much rarer and more local Gunnison Sage-Grouse, but Greater is larger and no range overlap. Also note darker tail and shorter wispier head plumes on Greater when displaying.
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