Pallid Swift vs Satin Swiftlet
Apus pallidus 对比 Collocalia uropygialis
Side-by-Side Comparison
| 属性 | Pallid Swift | Satin Swiftlet |
|---|---|---|
| 学名 | Apus pallidus | Collocalia uropygialis |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Not Evaluated |
| 体长 | — | — |
| 翼展 | 33.4 cm (13.1 in) | — |
| 体重 | 42.25 g (1.49 oz) | 5.4 g (0.19 oz) |
| 食性 | Aerial insectivore foraging continuously in flight, taking tiny flies, beetles, and ballooning spiders. | Aerial insectivore catching tiny flying insects, midges, and airborne spiders in fast low-altitude flight near … |
| 产卵数 | 1-4 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Pallid Swift
Melodic, rolling trill with rich timbre; sustained musical phrase with slight variations on repeated delivery at dusk.
Satin Swiftlet
Very thin, high twittering; rapid 'chip' notes over Bismarck Archipelago islands; echolocation clicks inside cave roosts; tiny; call barely distinguishable from other small swiftlets
Geographic Range & Migration
Pallid Swift
Breeds in the Mediterranean and North Africa east to Pakistan. Migratory; winters in sub-Saharan Africa from Senegal to Ethiopia.
Satin Swiftlet
Found in the Moluccas and southwestern Pacific including New Guinea and Solomon Islands. Resident in lowland forest, forest edge, and open areas.
保护状况
Pallid Swift
Satin Swiftlet
How to Tell Them Apart
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 …
Satin Swiftlet
Tiny; blackish upperparts with satiny blue-green gloss; white rump band; underparts dark sooty-grey; forked tail; Oceanian swiftlet with satin-like sheen on upperparts distinguishing it from duller relatives in the region.
About These Birds
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。
Satin Swiftlet
缎背金丝燕(Collocalia uropygialis)是一种体长9-10厘米的小型金丝燕，分布于俾斯麦群岛和所罗门群岛。上体深色具缎状光泽，腰部淡色。空中捕食昆虫，在洞穴和岩壁上筑巢。