Bates's Swift vs White-chested Swift
Apus batesi 比較対象 Cypseloides lemosi
Side-by-Side Comparison
| 属性 | Bates's Swift | White-chested Swift |
|---|---|---|
| 学名 | Apus batesi | Cypseloides lemosi |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 24.6 cm (9.7 in) | 30.0 cm (11.8 in) |
| 体重 | 22.1 g (0.78 oz) | 28.400000000000002 g (1.00 oz) |
| 食性 | Entirely airborne feeder on tiny flies, gnats, and airborne arachnids; one of the most aerial … | Obligate aerial forager catching small flies, aphids, winged termites, and airborne spiders on the wing. |
| 一腹卵数 | 2 | -- |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Bates's Swift
Rapid, light twittering with bright crystalline quality; cascading series of high pure notes tumbling freely in open air.
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
Bates's Swift
Found in a restricted range in West and Central Africa from Cameroon and Gabon. Resident in lowland rainforest. Rare and poorly known.
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.
保全状況
Bates's Swift
White-chested Swift
How to Tell Them Apart
Bates's Swift
Small; dark sooty-brown overall; narrow pale greyish-white rump band; pale greyish chin; underparts dark brown; forked tail; West African forest species; the narrowest and dullest rump band among African white-rumped …
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
Bates's Swift
A medium-sized swift (16-17 cm) found in lowland and montane forests of West and Central Africa. Dark plumage with a greenish gloss. Aerial insectivore. Colonial breeder. One of the least known African swifts due to its forest habitat. Named after George Latimer Bates.
White-chested Swift
コロンビアアマツバメはコロンビア南部に限定的に生息する希少なアマツバメである。