Volcano Swiftlet vs Pallid Swift
Aerodramus vulcanorum 对比 Apus pallidus
Side-by-Side Comparison
| 属性 | Volcano Swiftlet | Pallid Swift |
|---|---|---|
| 学名 | Aerodramus vulcanorum | Apus pallidus |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 24.0 cm (9.4 in) | 33.4 cm (13.1 in) |
| 体重 | 14.4 g (0.51 oz) | 42.25 g (1.49 oz) |
| 食性 | Entirely aerial diet of tiny insects and spiders; forages in large flocks over open country … | Aerial insectivore foraging continuously in flight, taking tiny flies, beetles, and ballooning spiders. |
| 产卵数 | 2 | 1-4 |
| 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
Pallid Swift
Melodic, rolling trill with rich timbre; sustained musical phrase with slight variations on repeated delivery at dusk.
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.
Pallid Swift
Breeds in the Mediterranean and North Africa east to Pakistan. Migratory; winters in sub-Saharan Africa from Senegal to Ethiopia.
保护状况
Volcano Swiftlet
Pallid 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 …
Pallid Swift
Medium-large; pale brownish-grey overall, distinctly paler than Common Swift; larger pale throat patch; wing coverts show pale scaly edges; Mediterranean and Middle Eastern species; pale sandy-brown tone separates it from …
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。
Pallid Swift
淡色雨燕在地中海沿岸和北非繁殖，颜色比普通雨燕更淡。