Drab Swiftlet vs Great Dusky Swift
Collocalia neglecta 对比 Cypseloides senex
Side-by-Side Comparison
| 属性 | Drab Swiftlet | Great Dusky Swift |
|---|---|---|
| 学名 | Collocalia neglecta | 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 | 5.9 g (0.21 oz) | 83.0 g (2.93 oz) |
| 食性 | Entirely airborne insectivore; feeds on minute flying insects and web-dispersing spiders over open habitats. | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … |
| 产卵数 | 1-2 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Drab Swiftlet
High, thin twittering; 'tsit-tsit' in flight; echolocation clicks inside cave roosts; small size and unremarkable plumage matched by simple, thin high-pitched calls
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
Drab Swiftlet
Found on the Andaman and Nicobar Islands and Simeuluë Island off Sumatra. Resident in coastal and lowland habitats. Sedentary.
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
Drab Swiftlet
Great Dusky Swift
How to Tell Them Apart
Drab Swiftlet
Tiny; dull brownish-grey upperparts with little or no gloss; whitish-buff rump band; pale greyish-buff underparts; forked tail; as the name implies, lacks the iridescent gloss of most Collocalia swiftlets; island …
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
Drab Swiftlet
暗色金丝燕(Collocalia neglecta)是一种体长10厘米的小型金丝燕，分布于菲律宾、苏拉威西和马鲁古群岛。深灰褐色羽毛，光泽度低于近似种。空中捕食昆虫，在洞穴和岩缝中筑巢。
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。