Standard-winged Nightjar
Caprimulgus longipennis
Females and non-breeding males are ordinary-looking, fairly plain nightjars, but breeding males have absurd “standards” growing out of the middle of their wings. In flight, they give the impression of a nightjar being chased by two bats. Found in savanna, broadleaf woodland, forest clearings, and open fields. The call is a very high-pitched and insect-like series of “tit” notes. Female and non-breeding male distinguished from most other nightjars by their lack of white in the wings and tail. They are very similar to female and non-breeding male Pennant-winged Nightjar, but are smaller.
识别特征
The adult male has a bizarre and unusual wing ornament during the breeding season which consists of a broad central flight feather on each wing elongated to 38 centimetres (15 in), much longer than the bird's body. 20 centimetres (7.9 in) or more of this is bare shaft. In normal flight, these feathers trail behind, but in display flight they are raised vertically like standards. Outside the breeding season, there are no plumage distinctions between the male and female.<p>When roosting on the ground during the day, this medium-sized (20–23 centimetres (7.9–9.1 in) long) nightjar is mainly variegated grey, with a browner collar. It is a shadowy form with easy, silent moth-like flight; this nightjar is relatively short-tailed, and lacks white in the wings or tail. The song is a churring trill.
分类信息
- 学名
- Caprimulgus longipennis
- 命名信息
- Shaw, 1796
- 目
- Caprimulgiformes
- 科
- Caprimulgidae
- 属
- Caprimulgus
分布与栖息地
It is a resident breeder in Africa from Senegal east to Ethiopia. It is found in dry savannah habitats, with some scrub.
- 迁徙
- Complete migrants
行为
Like other nightjars, the standard-winged nightjar feeds on insects in flight, the huge gape opening wide for moths and beetles. It flies at dusk, most often at sundown, and can sometimes be seen with flying foxes.<p>No nest is made; the two elongated and elliptical eggs are placed upon the bare ground.
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
White-necked Petrel
Pterodroma cervicalis
A large petrel with long wings and a long, thick bill. The dark “M” pattern on the wings contrasts with the gray back. The underwings are mostly white. Similar to Juan Fernandez Petrel, but the black cap is separated from the gray back by a broad white collar. Migrates through Hawaiian waters. mostly from the late summer through spring. Rare in Hawaii, but observed more often in the western end of the Archipelago.
Scale-throated Earthcreeper
Upucerthia dumetaria
Fairly common in the Andes and foothills, and locally common in shrub-steppe of Patagonia and Tierra del Fuego. Favors shrubby vegetation on rocky slopes and adjacent bogs and grassy areas; often sings from prominent perch on a rock or fencepost. In most of range, no similar species: note long arched bill, dusky scalloping on throat and breast, and pale eyebrow. Compare with Patagonian Forest Earthcreeper (until recently considered same species as Scale-throated).
Unicolored Antwren
Myrmotherula unicolor
Uncommon small, short-tailed antwren of the lower and middle levels of humid forests. Very active and often follows mixed-species flocks. Males are uniform gray with a small dark throat patch, while females are uniformly brown-gray, with less gray in the head than female Salvadori’s Antwrens.
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