Pallid Swift vs Pygmy Swiftlet
Apus pallidus 对比 Collocalia troglodytes
Side-by-Side Comparison
| 属性 | Pallid Swift | Pygmy Swiftlet |
|---|---|---|
| 学名 | Apus pallidus | Collocalia troglodytes |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 33.4 cm (13.1 in) | 18.6 cm (7.3 in) |
| 体重 | 42.25 g (1.49 oz) | 5.55 g (0.20 oz) |
| 食性 | Aerial insectivore foraging continuously in flight, taking tiny flies, beetles, and ballooning spiders. | Obligate aerial insectivore; catches minute flies, beetles, and aerial spiders while foraging near cave roosts. |
| 产卵数 | 1-4 | -- |
| 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.
Pygmy Swiftlet
Extremely high, thin twittering; among highest-pitched calls of any bird; 'tseee-tseee' barely audible to adults; uses echolocation clicks in Philippine limestone caves
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.
Pygmy Swiftlet
Endemic to the Philippines, found on Mindanao and adjacent islands. Resident in lowland forest and coastal caves. One of the smallest swiftlets.
保护状况
Pallid Swift
Pygmy 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 …
Pygmy Swiftlet
Tiny; dark blue-black upperparts with faint iridescence; white or pale buff rump band; underparts pale greyish-white; slightly forked tail; one of the smallest swiftlets in the Philippines; cave-nesting with pale …
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。
Pygmy Swiftlet
菲律宾金丝燕是菲律宾特有的小型金丝燕，以在石灰岩洞穴中筑巢而闻名。