Chimney Swift vs Great Dusky Swift
Chaetura pelagica 比較対象 Cypseloides senex
Side-by-Side Comparison
| 属性 | Chimney Swift | Great Dusky Swift |
|---|---|---|
| 学名 | Chaetura pelagica | Cypseloides senex |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保全状況 | Vulnerable | Least Concern |
| 体長 | — | — |
| 翼開長 | 24.9 cm (9.8 in) | 33.8 cm (13.3 in) |
| 体重 | 22.666666666666668 g (0.80 oz) | 83.0 g (2.93 oz) |
| 食性 | Aerial forager on tiny insects and wind-dispersed spiders; forages near water surfaces where insects concentrate. | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … |
| 一腹卵数 | 2-7 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Chimney Swift
Rapid, liquid twittering with bright cheerful quality; chi-chi-chi staccato notes carrying well across open sky at dusk.
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
Chimney Swift
Breeds in eastern North America from Canada south to Texas. Long-distance migrant wintering in the upper Amazon basin of Peru and Brazil.
Great Dusky Swift
Found in eastern South America from Venezuela and the Guianas south to Bolivia and Paraguay. Resident near rocky cliffs and waterfalls.
保全状況
Chimney Swift
Great Dusky Swift
How to Tell Them Apart
Chimney Swift
Small; uniformly dark sooty-grey overall with slightly paler grey throat and chin; no contrasting rump patch; short spiny tail; sexes identical; North American chimney-nesting species famous for its swirling pre-roost …
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
Chimney Swift
北米東部で繁殖し、南米北部で越冬する小型の鳥（体長12〜15cm）。細長い体と鎌型の翼が特徴で、食事・交尾・巣材集め以外はほぼ常に空中を飛び続ける。Chaetura pelagica（アマツバメ）は都市の煙突や中空の木を集団で営巣場所として利用する。「空飛ぶ葉巻」の愛称がある。Apodidae科。
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。