Seychelles Swiftlet vs White-collared Swift
Aerodramus elaphrus so với Streptoprocne zonaris
Side-by-Side Comparison
| Thuộc Tính | Seychelles Swiftlet | White-collared Swift |
|---|---|---|
| Tên Khoa Học | Aerodramus elaphrus | Streptoprocne zonaris |
| Bộ | Caprimulgiformes | Caprimulgiformes |
| Họ | Apodidae | Apodidae |
| Tình Trạng Bảo Tồn | Vulnerable | Least Concern |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 22,6 cm (8.9 in) | 42,5 cm (16.7 in) |
| Khối Lượng | 11,266666666666666 g (0.40 oz) | 106,45 g (3.75 oz) |
| Chế Độ Ăn | Feeds aerially on tiny flying insects and drifting spiders; often forages in mixed-species flocks over … | Obligate aerial insectivore; gathers small flying insects, winged ants, and airborne spiders during flight. |
| Số Trứng | 1 | 2 |
| Population Trend | — | — |
Habitat Comparison
Môi Trường Sống Chung
Seychelles Swiftlet only
White-collared Swift only
Không
Song & Call Comparison
Seychelles Swiftlet
Rapid twittering; thin 'tsit-tsit' over Seychelles islands; audible echolocation clicks in caves; endangered endemic; calls weakly in small flocks over forest and coast
White-collared Swift
Loud, screaming 'shreee-shreee'; powerful screeching trill; calls from large flocks over mountains; very audible; one of the loudest Neotropical swifts; alarm a harsh rattle
Geographic Range & Migration
Seychelles Swiftlet
Endemic to the Seychelles Islands in the western Indian Ocean. Resident on the main granitic islands including Mahé. Nests in sea caves.
White-collared Swift
Found from Mexico south through Central America to South America east of the Andes, reaching Bolivia and southern Brazil. Often in large flocks.
Tình Trạng Bảo Tồn
Seychelles Swiftlet
White-collared Swift
How to Tell Them Apart
Seychelles Swiftlet
Small; dark brownish-grey upperparts with slight gloss; pale grey-buff rump band; underparts whitish-grey; forked tail; Seychelles endemic and vulnerable due to restricted range; slightly larger and less glossy than sympatric …
White-collared Swift
Large; glossy blue-black plumage with bold broad white collar encircling entire neck; collar clean and complete; underparts black; large slightly forked tail; among the most recognisable Neotropical swifts due to …
About These Birds
Seychelles Swiftlet
A small swiftlet (10-11 cm) endemic to the Seychelles archipelago in the Indian Ocean. Dark grey-brown plumage with a pale rump. Aerial insectivore, foraging over forest and coastal areas. Colonial cave nester. Population under 10,000 individuals. Classified as Vulnerable.
White-collared Swift
A very large swift (20-22 cm, wingspan 45-55 cm) with a bold white collar band, the largest New World swift. Found from Mexico to southern Brazil and the Caribbean. Aerial insectivore, foraging in large, noisy flocks over forests and cities. Nests behind waterfalls and in caves.