Cape Verde Swift vs Great Dusky Swift
Apus alexandri comparé à Cypseloides senex
Side-by-Side Comparison
| Attribut | Cape Verde Swift | Great Dusky Swift |
|---|---|---|
| Nom scientifique | Apus alexandri | Cypseloides senex |
| Ordre | Caprimulgiformes | Caprimulgiformes |
| Famille | Apodidae | Apodidae |
| Statut de conservation | Least Concern | Least Concern |
| Longueur | — | — |
| Envergure | 27,5 cm (10.8 in) | 33,8 cm (13.3 in) |
| Poids | 39,4 g (1.39 oz) | 83,0 g (2.93 oz) |
| Régime alimentaire | Obligate aerial insectivore; gathers small flying insects, winged ants, and airborne spiders during flight. | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … |
| Taille de la couvée | 2 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Cape Verde Swift
Soft, musical whistling with smooth melodic quality; clear, unhurried phrases rising and falling gently in warm afternoon air.
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
Cape Verde Swift
Endemic to the Cape Verde Islands in the eastern Atlantic. Resident on several islands including São Vicente and Santo Antão.
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
Cape Verde Swift
Great Dusky Swift
How to Tell Them Apart
Cape Verde Swift
Dark sooty-brown overall; pale grey-white throat patch; underparts slightly paler brown; moderately forked tail; Cape Verde Islands endemic; similar to Common Swift but slightly smaller with more extensive pale throat …
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
Cape Verde Swift
A medium-sized swift (13-14 cm) endemic to the Cape Verde Islands in the eastern Atlantic. Dark plumage with a pale throat. Aerial insectivore, foraging over volcanic landscapes and towns. Resident population restricted to the archipelago. Closely related to Common Swift.
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.