Black Swift vs Great Dusky Swift
Cypseloides niger comparado con Cypseloides senex
Side-by-Side Comparison
| Atributo | Black Swift | Great Dusky Swift |
|---|---|---|
| Nombre científico | Cypseloides niger | Cypseloides senex |
| Orden | Caprimulgiformes | Caprimulgiformes |
| Familia | Apodidae | Apodidae |
| Estado de conservación | Vulnerable | Least Concern |
| Longitud | — | — |
| Envergadura | 29,9 cm (11.8 in) | 33,8 cm (13.3 in) |
| Peso | 41,55 g (1.47 oz) | 83,0 g (2.93 oz) |
| Dieta | 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 … |
| Tamaño de la puesta | 1 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Black Swift
Soft, buzzy chittering 'spee-spee'; thin twittering over mountain waterfalls; higher and softer than Common Swift; small flocks call weakly over nesting cliffs
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
Black Swift
Breeds in western North America from Alaska south to California and the Caribbean. Migrates to winter in Mexico and Central America.
Great Dusky Swift
Found in eastern South America from Venezuela and the Guianas south to Bolivia and Paraguay. Resident near rocky cliffs and waterfalls.
Estado de conservación
Black Swift
Great Dusky Swift
How to Tell Them Apart
Black Swift
Entirely black with slight glossy sheen; faint pale scaling on forehead and chin in fresh plumage; broad-winged and large-bodied; slightly forked tail; sexes alike; North American cliff-nesting swift with wholly …
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
Black Swift
A large swift (15-18 cm, wingspan 38 cm) with all-dark plumage and a slightly forked tail. Breeds on sea cliffs and behind waterfalls across western North America and the Caribbean. Aerial insectivore, foraging high over mountains and valleys. A long-distance migrant wintering in South America.
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.