Great Dusky Swift
Cypseloides senex
Large swift with uniform cold brown plumage with a pale face. Similar to Sooty Swift, but is larger and paler. Most often seen close to waterfalls where they roost and nest, often gathering in huge groups. Forages widely over a variety of habitats.
识别特征
The great dusky swift is the largest member of genus Cypseloides. It is 18 cm (7.1 in) long and weighs 56 to 110 g (2.0 to 3.9 oz). The sexes have the same plumage. Adults have a chocolate brown crown and throat with pale gray edges to the feathers, giving a frosted appearance to the face. Their back is a darker brown, their rump a brown intermediate between the head and back, and their tail blackish brown. Their undersides are a paler brown than the back. The upper side of the wing is mostly brown and the underside somewhat lighter. Juveniles are very similar to adults with the addition on pale fringes to the wing feathers.
分类信息
The great dusky swift is monotypic.
- 学名
- Cypseloides senex
- 命名信息
- (Temminck, 1826)
- 目
- Apodiformes
- 科
- Apodidae
- 属
- Cypseloides
分布与栖息地
The great dusky swift is found in Brazil from southern Pará and much of Mato Grosso east into Bahia and south to Rio Grande do Sul, in eastern Paraguay, and in northeastern Argentina's Misiones Province. Undocumented sight records in Bolivia lead the South American Classification Committee of the American Ornithological Society to treat it as hypothetical in that country. Its principal habitats are tropical evergreen forest, temperate forest, and second-growth scrublands. The species roosts around waterfalls and is known for flying through the Iguazu Falls on the border of Brazil and Argentina.
- 迁徙
- Complete migrants
行为
The great dusky swift is believed to be a year-round resident throughout its range.<p>Like all swifts, the great dusky is an aerial insectivore. Its diet is not known in detail but includes insects of at least five families. It often feeds in flocks that sometimes include white-collared swifts (Streptoprocne zonaris).<p>The great dusky swift nests in large colonies on a cliff, either beside or behind a waterfall. The nest is made of moss and pebbles cemented with mud.<p>The great dusky swift's principal vocalization is described as "a ti-ti-ti sound followed by a buzz, tirr-tshaarr."
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Yucatan Jay
Cyanocorax yucatanicus
Common and conspicuous in woodland and forest edge of Yucatan Peninsula, where there are no similar species. Usually found in groups of 5-25 birds, often chattering noisily. Black and bright blue plumage is distinctive. The bill is black on adult birds, yellow on juveniles and 1st-year birds. The striking white bodied juvenile plumage is held for only a few weeks in late summer before being replaced by adult-like black feathering.
Long-tufted Screech-Owl
Megascops sanctaecatarinae
Medium-sized screech-owl, very similar to Black-capped Screech Owl, but smaller and their ranges marginally overlap. Occurs in both brown and rufous morphs, both with yellow eyes. Found open woodland and forest edge, avoiding dense woodland. The song is a rolling trill, “rrrrrrr-ruh," lasting about 20 seconds.
Madagascar Flufftail
Sarothrura insularis
Tiny, skulking rail-like bird that is unlikely to be seen unless you’re expressly looking for it. The male is boldly red and black with white stripes, while the female is brownish and much plainer. Found on the ground in forest, scrub, heath, and wetlands in eastern, central, and northern Madagascar. Extremely shy and elusive, and most often detected by voice: a loud and explosive couple of “ki-dit” calls followed by a very long series of shorter “kit” notes. Much shorter-billed than the very rare Slender-billed Flufftail. All other rails are larger and have different coloration.
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