Bates's Swift vs Alpine Swift
Apus batesi so với Tachymarptis melba
Side-by-Side Comparison
| Thuộc Tính | Bates's Swift | Alpine Swift |
|---|---|---|
| Tên Khoa Học | Apus batesi | Tachymarptis melba |
| Bộ | Caprimulgiformes | Caprimulgiformes |
| Họ | Apodidae | Apodidae |
| Tình Trạng Bảo Tồn | Least Concern | Least Concern |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 24,6 cm (9.7 in) | 43,9 cm (17.3 in) |
| Khối Lượng | 22,1 g (0.78 oz) | 97,5 g (3.44 oz) |
| Chế Độ Ăn | Entirely airborne feeder on tiny flies, gnats, and airborne arachnids; one of the most aerial … | Aerial insectivore taking small flying insects and spiders; may forage at great heights following thermal … |
| Số Trứng | 2 | 1-4 |
| 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.
Alpine Swift
Rapid series of short, clipped whistles; bright, clean notes delivered in quick succession with occasional doubled phrase.
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.
Alpine Swift
Breeds from southern Europe and North Africa east through Central Asia and the Himalayas to India. Migratory; winters in sub-Saharan Africa.
Tình Trạng Bảo Tồn
Bates's Swift
Alpine 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 …
Alpine Swift
Large; dark brown upperparts; white throat patch separated from white belly by dark brown breast band; brown flanks; bold tricoloured underpart pattern; one of Europe's largest swifts with distinctive white …
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.
Alpine Swift
A large swift (20-22 cm, wingspan 54-60 cm) with a white belly and throat contrasting with dark brown upperparts. Found from southern Europe and Africa to Central Asia. Aerial insectivore, foraging at great heights. Nests on cliff faces in large colonies. Powerful, fast flier.