Volcano Swiftlet vs Great Dusky Swift
Aerodramus vulcanorum 对比 Cypseloides senex
Side-by-Side Comparison
| 属性 | Volcano Swiftlet | Great Dusky Swift |
|---|---|---|
| 学名 | Aerodramus vulcanorum | Cypseloides senex |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 24.0 cm (9.4 in) | 33.8 cm (13.3 in) |
| 体重 | 14.4 g (0.51 oz) | 83.0 g (2.93 oz) |
| 食性 | Entirely aerial diet of tiny insects and spiders; forages in large flocks over open country … | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … |
| 产卵数 | 2 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Volcano Swiftlet
High twittering calls; thin 'tsit' notes over Javan volcanic mountains; echolocation clicks in cave roosts; slightly larger than many swiftlets; calls produce soft chattering
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
Volcano Swiftlet
Endemic to the volcanoes of Java at 1,000–3,400 m. Resident in montane forest near active and dormant craters. Very restricted range.
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
Volcano Swiftlet
Great Dusky Swift
How to Tell Them Apart
Volcano Swiftlet
Small; dark sooty-brown upperparts; grey-brown rump barely paler than back; underparts dark grey-brown; forked tail; restricted to Java's volcanoes; notably lacks a distinct pale rump band contrasting with the dark …
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
Volcano Swiftlet
一种小型金丝燕（体长10-11厘米），特产于印度尼西亚爪哇、苏门答腊和巴厘岛的高山火山地区。属雨燕科（Apodidae），在火山洞穴中繁殖，是适应火山地貌的特有种。
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。