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
Tumbes Hummingbird
Thaumasius baeri
A plain hummingbird found in dry forest and scrub in southwestern Ecuador and northwestern Peru. It is dull green with light gray underparts, a white spot behind the eye, and a thick, slightly curved bill. Some birds show very faint spots on the throat. Similar to Spot-throated Hummingbird, but throat markings are much less conspicuous or entirely absent. Ranges are also different; Tumbes Hummingbird is found only on the Pacific side of the Andes and does not reach the Marañon drainage.
Spangled Kookaburra
Dacelo tyro
A large kingfisher of Savanna and monsoon forest. Very thick bicolored bill, spotted head, pale underparts, dark wing with pale blue patch, pale blue rump and darker blue tail. Freezes in position for long periods, occasionally lifting its tail slowly, then flicking it quickly down. Hunts insect prey on the ground. Similar to Blue-winged Kookaburra, but Spangled Kookaburra is smaller with a spotted rather than streaked head and lacks white outer tail feathers.Often duets, with a rhythmic, repeated “gok-gok!” interspersed with a rattling trill.
Marail Guan
Penelope marail
Medium-sized guan of rainforest canopy. Usually appears entirely dark; note short-legged profile, contrasting red throat patch, and sluggish behavior. Slips quietly through canopy, feeding on fruit; typically found alone or in pairs but may congregate at fruiting trees. Generally wary, especially where hunted, but sometimes tolerates close approach. May be seen near the ground at forest edge or along roadsides. Very similar to Spix’s Guan; Marail is smaller and shorter-legged, but this can be surprisingly difficult to judge accurately.
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