Mascarene Swiftlet vs White-chested Swift
Aerodramus francicus 对比 Cypseloides lemosi
Side-by-Side Comparison
| 属性 | Mascarene Swiftlet | White-chested Swift |
|---|---|---|
| 学名 | Aerodramus francicus | Cypseloides lemosi |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Near Threatened | Least Concern |
| 体长 | — | — |
| 翼展 | 21.8 cm (8.6 in) | 30.0 cm (11.8 in) |
| 体重 | 10.419999999999998 g (0.37 oz) | 28.400000000000002 g (1.00 oz) |
| 食性 | Aerial insectivore consuming minute dipterans, midges, and ballooning spiders caught in continuous fast flight. | Obligate aerial forager catching small flies, aphids, winged termites, and airborne spiders on the wing. |
| 产卵数 | 1-2 | -- |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Mascarene Swiftlet
Thin, rapid chittering; soft 'tsit' notes over Reunion and Mauritius; echolocation clicks in cave roosts; endemic island species; calls weakly; colonial roosting produces faint noise
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
Mascarene Swiftlet
Endemic to the Mascarene Islands of Réunion and Mauritius in the southwestern Indian Ocean. Nests in sea caves and rock crevices.
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
Mascarene Swiftlet
White-chested Swift
How to Tell Them Apart
Mascarene Swiftlet
Small; dark blackish-brown upperparts with slight greenish gloss; pale buff-grey rump band; pale grey-white underparts; forked tail; Mascarene Island endemic of Réunion and Mauritius with slightly dusky-toned underparts.
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
Mascarene Swiftlet
一种小型金丝燕（体长10-11厘米），特产于西印度洋的毛里求斯和留尼汪岛。体羽深褐色。属雨燕科（Apodidae），在岛上的洞穴中繁殖，是两岛的特有种。
White-chested Swift
哥伦比亚雨燕限于哥伦比亚南部，是罕见的雨燕。