Sooty Swift vs Great Dusky Swift
Cypseloides fumigatus comparé à Cypseloides senex
Side-by-Side Comparison
| Attribut | Sooty Swift | Great Dusky Swift |
|---|---|---|
| Nom scientifique | Cypseloides fumigatus | Cypseloides senex |
| Ordre | Caprimulgiformes | Caprimulgiformes |
| Famille | Apodidae | Apodidae |
| Statut de conservation | Least Concern | Least Concern |
| Longueur | — | — |
| Envergure | 29,0 cm (11.4 in) | 33,8 cm (13.3 in) |
| Poids | 41,666666666666664 g (1.47 oz) | 83,0 g (2.93 oz) |
| Régime alimentaire | Catches aerial plankton — tiny midges, gnats, and ballooning spiders — continuously during soaring flight. | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … |
| Taille de la couvée | 1 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Sooty Swift
Soft twittering 'tsit-tsit'; thin, buzzy notes in flight; calls over Neotropical waterfalls and gorges; quiet, raspy trill; rarely as vocal as larger swift species
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
Sooty Swift
Found in the Guiana Shield and Amazon Basin in Brazil, Venezuela, and the Guianas. Nomadic; associated with rocky outcrops and waterfalls.
Great Dusky Swift
Found in eastern South America from Venezuela and the Guianas south to Bolivia and Paraguay. Resident near rocky cliffs and waterfalls.
Statut de conservation
Sooty Swift
Great Dusky Swift
How to Tell Them Apart
Sooty Swift
Uniformly dark sooty-brown plumage throughout; no contrasting pale markings anywhere; slightly paler brownish-grey on throat; large and uniform; South American species whose entirely dark coloration recalls blackish swiftlets but much …
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
Sooty Swift
A medium-sized swift (15-17 cm) found in subtropical and montane forests of southeastern Brazil, Paraguay, and Argentina. Sooty-brown plumage. Aerial insectivore, foraging over forested gorges and waterfalls. Nests behind waterfalls on wet rock faces.
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.