Little Swift vs Great Dusky Swift
Apus affinis so với Cypseloides senex
Side-by-Side Comparison
| Thuộc Tính | Little Swift | Great Dusky Swift |
|---|---|---|
| Tên Khoa Học | Apus affinis | Cypseloides senex |
| Bộ | Caprimulgiformes | Caprimulgiformes |
| Họ | Apodidae | Apodidae |
| Tình Trạng Bảo Tồn | Least Concern | Least Concern |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 25,3 cm (10.0 in) | 33,8 cm (13.3 in) |
| Khối Lượng | 25,0 g (0.88 oz) | 83,0 g (2.93 oz) |
| Chế Độ Ăn | Exclusively aerial diet; consumes tiny flying insects and spiders, sometimes following insect swarms for km. | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … |
| Số Trứng | 1-3 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Little Swift
Harsh, crackling chatter with emphatic rhythm; series of rough notes delivered at pace with occasional sharp screech.
Great Dusky Swift
Loud, churring trill; harsher and louder than other Cypseloides; calls over Iguacu Falls and major Neotropical waterfalls; buzzy 'bzzzt-bzzzt' in aerial groups
Geographic Range & Migration
Little Swift
Found across Africa and Asia from Senegal east to India and Sri Lanka, and southeast to Southeast Asia. Common in urban areas and open country.
Great Dusky Swift
Found in eastern South America from Venezuela and the Guianas south to Bolivia and Paraguay. Resident near rocky cliffs and waterfalls.
Tình Trạng Bảo Tồn
Little Swift
Great Dusky Swift
How to Tell Them Apart
Little Swift
Small; dark sooty-brown; large white rump patch; white throat; underparts dark; square-ended tail; widespread from Africa to Asia; the large square white rump patch and square tail distinguish it from …
Great Dusky Swift
Very large; entirely dark sooty-brown with pale grey forehead and chin scaling; slightly paler underparts; broad wings; largest Cypseloides swift; South American waterfall specialist with dusky uniform plumage and imposing …
About These Birds
Little Swift
A small swift (12-13 cm) widespread across the Old World tropics from Africa through Asia to Australasia. Dark plumage with a white rump and broad, square tail. Aerial insectivore. Commonly nests in colonies on buildings and bridges. One of the most familiar swifts in tropical towns.
Great Dusky Swift
A large swift (18-20 cm) of southeastern Brazil, eastern Paraguay, and northeastern Argentina. Dark sooty-brown plumage. Aerial insectivore, foraging over forested gorges and waterfalls. Nests in large colonies behind waterfalls. The largest member of the genus Cypseloides.