Great Dusky Swift vs Lesser Swallow-tailed Swift
Cypseloides senex so với Panyptila cayennensis
Side-by-Side Comparison
| Thuộc Tính | Great Dusky Swift | Lesser Swallow-tailed Swift |
|---|---|---|
| Tên Khoa Học | Cypseloides senex | Panyptila cayennensis |
| Bộ | Caprimulgiformes | Caprimulgiformes |
| Họ | Apodidae | Apodidae |
| Tình Trạng Bảo Tồn | Least Concern | Least Concern |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 33,8 cm (13.3 in) | 23,8 cm (9.4 in) |
| Khối Lượng | 83,0 g (2.93 oz) | 21,8 g (0.77 oz) |
| Chế Độ Ăn | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … | Aerial insectivore feeding on swarms of small flies, winged ants, and tiny beetles during sustained … |
| Số Trứng | 1-2 | 2-3 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
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
Lesser Swallow-tailed Swift
Dry, clicking chatter interspersed with thin whistles; rapid mechanical trill delivered with persistent energy throughout day.
Geographic Range & Migration
Great Dusky Swift
Found in eastern South America from Venezuela and the Guianas south to Bolivia and Paraguay. Resident near rocky cliffs and waterfalls.
Lesser Swallow-tailed Swift
Found from Mexico south through Central America and South America to Bolivia and Brazil. Resident in lowland and foothill forest edge.
Tình Trạng Bảo Tồn
Great Dusky Swift
Lesser Swallow-tailed Swift
How to Tell Them Apart
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 …
Lesser Swallow-tailed Swift
Black upperparts; white throat and white flanks; white rump patch; deeply forked long tail; smaller version of Great Swallow-tailed Swift; widespread from Mexico to South America; forked tail and bold …
About These Birds
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.
Lesser Swallow-tailed Swift
A medium-sized swift (13-14 cm) with a moderately forked tail and white throat patch. Found from southern Mexico through Central America to Peru and Brazil. Dark plumage. Aerial insectivore, foraging over forest canopy and clearings. Nests under overhanging cliffs and bridges.