Palau Swiftlet vs White-chested Swift
Aerodramus pelewensis 对比 Cypseloides lemosi
Side-by-Side Comparison
| 属性 | Palau Swiftlet | White-chested Swift |
|---|---|---|
| 学名 | Aerodramus pelewensis | Cypseloides lemosi |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 21.5 cm (8.5 in) | 30.0 cm (11.8 in) |
| 体重 | 13.3 g (0.47 oz) | 28.400000000000002 g (1.00 oz) |
| 食性 | Aerial plankton specialist catching tiny flies, gnats, and airborne spiders in tight acrobatic flight. | Obligate aerial forager catching small flies, aphids, winged termites, and airborne spiders on the wing. |
| 产卵数 | 1 | -- |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Palau Swiftlet
Rapid thin twittering; high 'tsit' notes over Palau islands; audible echolocation clicks in cave and building roosts; endemic island species; calls weakly in small flocks
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
Palau Swiftlet
Endemic to the Palau Islands in Micronesia. Resident on all major islands; nests in limestone caves. Small but stable 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
Palau Swiftlet
White-chested Swift
How to Tell Them Apart
Palau Swiftlet
Small; dark grey-brown upperparts; pale buff-grey rump band; underparts pale greyish-white; forked tail; Palau Island endemic; closely resembles Caroline Swiftlet but restricted to Palau and differing in subtle measurements.
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
Palau Swiftlet
一种小型金丝燕（体长10-11厘米），特产于西太平洋帕劳群岛。体羽深色。属雨燕科（Apodidae），是帕劳的特有种，在岛上洞穴中繁殖。
White-chested Swift
哥伦比亚雨燕限于哥伦比亚南部，是罕见的雨燕。