Uniform Swiftlet vs Pallid Swift
Aerodramus vanikorensis 对比 Apus pallidus
Side-by-Side Comparison
| 属性 | Uniform Swiftlet | Pallid Swift |
|---|---|---|
| 学名 | Aerodramus vanikorensis | Apus pallidus |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 23.2 cm (9.1 in) | 33.4 cm (13.1 in) |
| 体重 | 10.4 g (0.37 oz) | 42.25 g (1.49 oz) |
| 食性 | Tiny aerial insectivore taking small flying insects and spiders; congregates where insects emerge over water. | Aerial insectivore foraging continuously in flight, taking tiny flies, beetles, and ballooning spiders. |
| 产卵数 | 1-2 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Uniform Swiftlet
Thin, high-pitched twittering; 'tsit-tsit' notes over Pacific islands; echolocation clicks inside caves; uniform dark plumage matched by simple unremarkable call quality
Pallid Swift
Melodic, rolling trill with rich timbre; sustained musical phrase with slight variations on repeated delivery at dusk.
Geographic Range & Migration
Uniform Swiftlet
Found across Melanesia from the Moluccas and New Guinea east through the Solomons, Vanuatu, and Fiji. Resident in diverse habitats.
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
Uniform Swiftlet
Pallid Swift
How to Tell Them Apart
Uniform Swiftlet
Small; dark grey-brown plumage throughout with rump barely or not at all paler than back; underparts slightly paler grey-brown; forked tail; unusually for Aerodramus, has minimal rump contrast; widespread Melanesian …
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
Uniform Swiftlet
一种小型金丝燕（体长11-12厘米），广泛分布于从马来半岛经印度尼西亚至美拉尼西亚的地区。体羽深色。属雨燕科（Apodidae），是西太平洋岛屿上常见的金丝燕。
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。