Plain Swift vs White-chested Swift
Apus unicolor 对比 Cypseloides lemosi
Side-by-Side Comparison
| 属性 | Plain Swift | White-chested Swift |
|---|---|---|
| 学名 | Apus unicolor | Cypseloides lemosi |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 29.9 cm (11.8 in) | 30.0 cm (11.8 in) |
| 体重 | 24.2 g (0.85 oz) | 28.400000000000002 g (1.00 oz) |
| 食性 | Exclusively aerial insectivore catching small flying insects and spiders drifting in aerial plankton at altitude. | 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
Plain Swift
Harsh, grating scream with descending inflection; loud raspy calls carrying urgency, often given during colony disturbance.
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
Plain Swift
Breeds on the Azores, Madeira, and Canary Islands. Resident on these Macaronesian archipelagos. Closely related to Common Swift.
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
Plain Swift
White-chested Swift
How to Tell Them Apart
Plain Swift
Dark sooty-brown plumage; very faint pale chin; no distinct throat patch; entirely plain and uniform; smaller than Common Swift; Macaronesian endemic breeding in Canary Islands and Madeira; coloration slightly paler …
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
Plain Swift
单色雨燕在大西洋岛屿和非洲西北部繁殖，具有黑褐色羽毛。
White-chested Swift
哥伦比亚雨燕限于哥伦比亚南部，是罕见的雨燕。