Cook's Swift vs White-chested Swift
Apus cooki so với Cypseloides lemosi
Side-by-Side Comparison
| Thuộc Tính | Cook's Swift | White-chested Swift |
|---|---|---|
| Tên Khoa Học | Apus cooki | Cypseloides lemosi |
| Bộ | Caprimulgiformes | Caprimulgiformes |
| Họ | Apodidae | Apodidae |
| Tình Trạng Bảo Tồn | Not Evaluated | Least Concern |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | — | 30,0 cm (11.8 in) |
| Khối Lượng | 42,949999999999996 g (1.52 oz) | 28,400000000000002 g (1.00 oz) |
| Chế Độ Ăn | Catches aerial plankton — tiny midges, gnats, and ballooning spiders — continuously during soaring flight. | Obligate aerial forager catching small flies, aphids, winged termites, and airborne spiders on the wing. |
| Số Trứng | -- | -- |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Cook's Swift
Bright, flute-like series of liquid notes; clear melodic phrase ascending slightly then resolving on a sustained pure tone.
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
Cook's Swift
Found from southern Thailand through the Thai-Malay Peninsula to Sumatra, Borneo, and adjacent islands. Resident in lowland forest.
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.
Tình Trạng Bảo Tồn
Cook's Swift
White-chested Swift
How to Tell Them Apart
Cook's Swift
Dark sooty-brown upperparts; white rump patch; pale white throat; dark underparts; deeply forked tail; recently split taxon from Pacific Swift complex; plumage essentially identical to close relatives, distinguished primarily by …
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
Cook's Swift
A medium-sized swift (16-17 cm) found in montane forests from the Malay Peninsula through Southeast Asia to southern China. Dark plumage with a pale throat. Aerial insectivore. Named after Frederick Cook. Until recently considered conspecific with Pacific Swift.
White-chested Swift
A medium-sized swift (14-15 cm) endemic to the upper Cauca Valley of Colombia. Sooty-black plumage with a white breast patch. Aerial insectivore of subtropical forests. Classified as Endangered due to extremely restricted range and ongoing habitat loss.