Atiu Swiftlet vs White-chested Swift
Aerodramus sawtelli 对比 Cypseloides lemosi
Side-by-Side Comparison
| 属性 | Atiu Swiftlet | White-chested Swift |
|---|---|---|
| 学名 | Aerodramus sawtelli | Cypseloides lemosi |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Vulnerable | Least Concern |
| 体长 | — | — |
| 翼展 | 23.2 cm (9.1 in) | 30.0 cm (11.8 in) |
| 体重 | 8.6 g (0.30 oz) | 28.400000000000002 g (1.00 oz) |
| 食性 | Small aerial insectivore feeding on minute flying insects and spiders; forages over forest canopy and … | Obligate aerial forager catching small flies, aphids, winged termites, and airborne spiders on the wing. |
| 产卵数 | 2 | -- |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Atiu Swiftlet
Very high thin twittering; 'tsit' calls over Cook Islands; audible echolocation clicks inside Atiu makatea caves; vulnerable endemic; vocal near cave entrances only
White-chested Swift
High, thin twittering; soft 'tsit' calls in flight; calls over Colombian waterfalls; very poorly known; thin, reedy contact notes; one of most rarely documented swifts
Geographic Range & Migration
Atiu Swiftlet
Endemic to Atiu Island in the southern Cook Islands. Resident on this single island; nests in limestone caves. Small and vulnerable population.
White-chested Swift
Known from Colombia and adjacent Ecuador. One of the world's rarest swifts; recorded at waterfalls in humid forest foothills at 500–1,200 m.
保护状况
Atiu Swiftlet
White-chested Swift
How to Tell Them Apart
Atiu Swiftlet
Tiny; dark grey-brown upperparts; pale grey rump band; underparts whitish-grey; forked tail; Cook Islands endemic restricted to Atiu Island; extremely small range and vulnerable status; plumage similar to Polynesian Swiftlet.
White-chested Swift
Black upperparts and wings; distinctive large white chest patch contrasting sharply with black throat and belly; white confined to central breast; Colombian endemic with unique bold bicoloured plumage unlike any …
About These Birds
Atiu Swiftlet
一种小型金丝燕（体长10厘米），特产于南太平洋库克群岛的阿提乌岛。体羽深色。属雨燕科（Apodidae），是极为局限分布的特有种，种群数量需要保护。
White-chested Swift
哥伦比亚雨燕限于哥伦比亚南部，是罕见的雨燕。