Great Dusky Swift vs Waterfall Swift
Cypseloides senex comparado con Hydrochous gigas
Side-by-Side Comparison
| Atributo | Great Dusky Swift | Waterfall Swift |
|---|---|---|
| Nombre científico | Cypseloides senex | Hydrochous gigas |
| Orden | Caprimulgiformes | Caprimulgiformes |
| Familia | Apodidae | Apodidae |
| Estado de conservación | Least Concern | Near Threatened |
| Longitud | — | — |
| Envergadura | 33,8 cm (13.3 in) | 29,2 cm (11.5 in) |
| Peso | 83,0 g (2.93 oz) | 38,540000000000006 g (1.36 oz) |
| Dieta | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … | Obligate aerial forager; feeds entirely on the wing on small flying insects, midges, and airborne … |
| Tamaño de la puesta | 1-2 | 1 |
| 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
Waterfall Swift
Rapid, high-pitched twittering; sharp 'tsit-tsit' calls over Southeast Asian waterfalls; thin metallic notes; nest behind waterfalls; calls audible over roaring water
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.
Waterfall Swift
Found from southern Thailand through the Thai-Malay Peninsula to Sumatra and Borneo. Restricted to rivers near waterfalls. Scarce.
Estado de conservación
Great Dusky Swift
Waterfall 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 …
Waterfall Swift
Blackish-brown upperparts with slight gloss; grey-brown underparts paler than back; pale grey-white chin and throat; no rump patch; robust-bodied and large; Southeast Asian waterfall specialist with uniformly dark plumage and …
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.
Waterfall Swift
El vencejo gigante del Himalaya es el vencejo más grande del mundo, que habita en gargantas montañosas del sur y sureste de Asia, donde forrajea en vuelo.