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Side-by-Side Comparison

属性	Blyth's Swift	Pallid Swift
学名	Apus leuconyx	Apus pallidus
目	Caprimulgiformes	Caprimulgiformes
科	Apodidae	Apodidae
保护状况	Not Evaluated	Least Concern
体长	—	—
翼展	—	33.4 cm (13.1 in)
体重	42.949999999999996 g (1.52 oz)	42.25 g (1.49 oz)
食性	Obligate aerial insectivore; takes small flies, beetles, and aerial spiders in swooping fast-flight passes.	Aerial insectivore foraging continuously in flight, taking tiny flies, beetles, and ballooning spiders.
产卵数	2-3	1-4
Population Trend	—	—

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Habitat Comparison

共同栖息地

无

Blyth's Swift only

🌲 Forest

Pallid Swift only

🌾 Grassland 🏖️ Coastal

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Song & Call Comparison

Blyth's Swift

鸣唱

Loud, piercing screech with shrill metallic quality; powerful prolonged calls audible from considerable distances in open sky.

Pallid Swift

鸣唱

Melodic, rolling trill with rich timbre; sustained musical phrase with slight variations on repeated delivery at dusk.

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Geographic Range & Migration

Blyth's Swift

Found from Central Asia and the Himalayas east to China and southeastern Russia. Migratory; winters in South and Southeast Asia.

Pallid Swift

Breeds in the Mediterranean and North Africa east to Pakistan. Migratory; winters in sub-Saharan Africa from Senegal to Ethiopia.

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保护状况

Not Evaluated

Blyth's Swift

Least Concern

Pallid Swift

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How to Tell Them Apart

Blyth's Swift

羽毛

Dark blackish-brown upperparts; white rump patch; white throat; underparts dark brown; deeply forked tail; recently described species closely related to Pacific Swift; separation based on molecular and biometric characters.

Pallid Swift

羽毛

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 …

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About These Birds

Blyth's Swift

白爪雨燕分布于中亚至南亚，以白色爪子为特征的雨燕。

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。

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