White-tipped Swift vs Great Dusky Swift
Aeronautes montivagus в сравнении с Cypseloides senex
Side-by-Side Comparison
| Характеристика | White-tipped Swift | Great Dusky Swift |
|---|---|---|
| Научное название | Aeronautes montivagus | Cypseloides senex |
| Отряд | Caprimulgiformes | Caprimulgiformes |
| Семейство | Apodidae | Apodidae |
| Охранный статус | Least Concern | Least Concern |
| Длина | — | — |
| Размах крыльев | 23,0 cm (9.1 in) | 33,8 cm (13.3 in) |
| Масса | 20,21666666666667 g (0.71 oz) | 83,0 g (2.93 oz) |
| Питание | Obligate aerial feeder on small insects and arachnids; catches prey in a wide gape during … | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … |
| Размер кладки | 4-5 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
White-tipped Swift
High, pure whistle fading to sibilant ending; soft series of descending notes with slight wavering, rarely heard distinctly.
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
White-tipped Swift
Found in the Andes and tepuis of Venezuela, Colombia, Ecuador, Peru, and Bolivia at 500–3,000 m. Resident in montane rocky outcrops.
Great Dusky Swift
Found in eastern South America from Venezuela and the Guianas south to Bolivia and Paraguay. Resident near rocky cliffs and waterfalls.
Охранный статус
White-tipped Swift
Great Dusky Swift
How to Tell Them Apart
White-tipped Swift
Dark blackish-brown; white throat and pale flanks; white tips to secondaries forming a white trailing-edge band on wing; smaller than White-throated Swift; Andean species distinguished by white-tipped secondary pattern.
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
White-tipped Swift
A medium-sized swift (13-14 cm) found in montane regions from Mexico to Venezuela and Peru. Dark plumage with white tips on the outer tail feathers. Aerial insectivore, foraging over mountain slopes and cloud forests. Often seen in flocks along steep mountain ridges.
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.