Chimney Swift vs Great Dusky Swift
Chaetura pelagica comparado con Cypseloides senex
Side-by-Side Comparison
| Atributo | Chimney Swift | Great Dusky Swift |
|---|---|---|
| Nombre científico | Chaetura pelagica | Cypseloides senex |
| Orden | Caprimulgiformes | Caprimulgiformes |
| Familia | Apodidae | Apodidae |
| Estado de conservación | Vulnerable | Least Concern |
| Longitud | — | — |
| Envergadura | 24,9 cm (9.8 in) | 33,8 cm (13.3 in) |
| Peso | 22,666666666666668 g (0.80 oz) | 83,0 g (2.93 oz) |
| Dieta | Aerial forager on tiny insects and wind-dispersed spiders; forages near water surfaces where insects concentrate. | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … |
| Tamaño de la puesta | 2-7 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Chimney Swift
Rapid, liquid twittering with bright cheerful quality; chi-chi-chi staccato notes carrying well across open sky at dusk.
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
Chimney Swift
Breeds in eastern North America from Canada south to Texas. Long-distance migrant wintering in the upper Amazon basin of Peru and Brazil.
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
Chimney Swift
Great Dusky Swift
How to Tell Them Apart
Chimney Swift
Small; uniformly dark sooty-grey overall with slightly paler grey throat and chin; no contrasting rump patch; short spiny tail; sexes identical; North American chimney-nesting species famous for its swirling pre-roost …
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
Chimney Swift
Vencejo de chimenea (Chaetura pelagica), 12–14 cm. Plumaje gris oscuro uniforme; garganta gris pálida. Cola muy corta y espinosa. Antes nidificaba en árboles huecos, ahora principalmente en chimeneas. Gran migrador: cría en el este de Norteamérica e inverna en el oeste de América del Sur.
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.