Western Glossy Swiftlet vs Great Dusky Swift
Collocalia affinis 对比 Cypseloides senex
Side-by-Side Comparison
| 属性 | Western Glossy Swiftlet | Great Dusky Swift |
|---|---|---|
| 学名 | Collocalia affinis | Cypseloides senex |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Not Evaluated | Least Concern |
| 体长 | — | — |
| 翼展 | — | 33.8 cm (13.3 in) |
| 体重 | 8.65 g (0.31 oz) | 83.0 g (2.93 oz) |
| 食性 | Aerial insectivore consuming minute dipterans, midges, and ballooning spiders caught in continuous fast flight. | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … |
| 产卵数 | 1-3 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Western Glossy Swiftlet
High, thin 'tsit-tsit'; rapid chittering in flight; echolocation clicks used inside caves; tiny size produces very high-pitched thin calls; soft twittering over forest
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
Western Glossy Swiftlet
Found from the Andaman Islands and northeastern India through Southeast Asia to Borneo and the Philippines. Resident in diverse forest habitats.
Great Dusky Swift
Found in eastern South America from Venezuela and the Guianas south to Bolivia and Paraguay. Resident near rocky cliffs and waterfalls.
保护状况
Western Glossy Swiftlet
Great Dusky Swift
How to Tell Them Apart
Western Glossy Swiftlet
Tiny; glossy blue-black upperparts with green iridescence; underparts dark sooty-grey; white-buff rump band; deeply forked tail; recently split taxon similar to Philippine Glossy Swiftlet but with subtly different rump and …
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
Western Glossy Swiftlet
西部光背雨燕(Collocalia affinis)是一种体长9-10厘米的小型金丝燕，分布于马来半岛、苏门答腊和婆罗洲的低地和丘陵森林。上体具蓝黑光泽。空中捕食昆虫，在洞穴或岩壁上用唾液筑巢。
Great Dusky Swift
大暗色雨燕分布于巴西和阿根廷，在大型瀑布附近繁殖的雨燕。