Plain Swift vs White-collared Swift
Apus unicolor so với Streptoprocne zonaris
Side-by-Side Comparison
| Thuộc Tính | Plain Swift | White-collared Swift |
|---|---|---|
| Tên Khoa Học | Apus unicolor | Streptoprocne zonaris |
| Bộ | Caprimulgiformes | Caprimulgiformes |
| Họ | Apodidae | Apodidae |
| Tình Trạng Bảo Tồn | Least Concern | Least Concern |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 29,9 cm (11.8 in) | 42,5 cm (16.7 in) |
| Khối Lượng | 24,2 g (0.85 oz) | 106,45 g (3.75 oz) |
| Chế Độ Ăn | Exclusively aerial insectivore catching small flying insects and spiders drifting in aerial plankton at altitude. | Obligate aerial insectivore; gathers small flying insects, winged ants, and airborne spiders during flight. |
| Số Trứng | 2 | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Plain Swift
Harsh, grating scream with descending inflection; loud raspy calls carrying urgency, often given during colony disturbance.
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
Plain Swift
Breeds on the Azores, Madeira, and Canary Islands. Resident on these Macaronesian archipelagos. Closely related to Common Swift.
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
Plain Swift
White-collared Swift
How to Tell Them Apart
Plain Swift
Dark sooty-brown plumage; very faint pale chin; no distinct throat patch; entirely plain and uniform; smaller than Common Swift; Macaronesian endemic breeding in Canary Islands and Madeira; coloration slightly paler …
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
Plain Swift
A medium-sized swift (14-15 cm) endemic to the Macaronesian islands of Madeira and the Canaries. Dark brown plumage, slightly paler than Common Swift. Aerial insectivore. Resident population on the islands. Closely related to Common Swift but lacks the pale throat patch.
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.