Great Dusky Swift vs Great Swallow-tailed Swift
Cypseloides senex 比較対象 Panyptila sanctihieronymi
Side-by-Side Comparison
| 属性 | Great Dusky Swift | Great Swallow-tailed Swift |
|---|---|---|
| 学名 | Cypseloides senex | Panyptila sanctihieronymi |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 33.8 cm (13.3 in) | 36.8 cm (14.5 in) |
| 体重 | 83.0 g (2.93 oz) | 48.416666666666664 g (1.71 oz) |
| 食性 | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … | Catches aerial plankton — tiny midges, gnats, and ballooning spiders — continuously during soaring flight. |
| 一腹卵数 | 1-2 | 2-3 |
| 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
Great Swallow-tailed Swift
Soft, rippling trill with liquid overtones; easy flowing sequence of mellow notes carrying pleasantly across open sky.
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.
Great Swallow-tailed Swift
Found from southern Mexico through Guatemala, Honduras, to Costa Rica. Resident in humid highland forest at 600–2,000 m elevation.
保全状況
Great Dusky Swift
Great Swallow-tailed 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 …
Great Swallow-tailed Swift
Black upperparts with white throat and white flanks; bold white rump patch; extremely long deeply forked tail with white outer feather edges; Central American species with the most spectacular forked …
About These Birds
Great Dusky Swift
グレートダスキースウィフトはブラジルとアルゼンチンに分布し、大きな滝の周辺で繁殖するアマツバメである。
Great Swallow-tailed Swift
A large swift (18-20 cm) with an extremely long, deeply forked tail. Dark plumage with a white throat and collar. Found in highland forests from southern Mexico to Honduras. Aerial insectivore, foraging over mountain canyons and pine-oak forests. Uncommon and rarely observed.