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Side-by-Side Comparison

属性	Pacific Swift	Pallid Swift
学名	Apus pacificus	Apus pallidus
目	Caprimulgiformes	Caprimulgiformes
科	Apodidae	Apodidae
保护状况	Least Concern	Least Concern
体长	—	—
翼展	34.6 cm (13.6 in)	33.4 cm (13.1 in)
体重	41.516666666666666 g (1.46 oz)	42.25 g (1.49 oz)
食性	Feeds aerially on tiny insects and spiders, often following weather fronts where aerial plankton concentrates.	Aerial insectivore foraging continuously in flight, taking tiny flies, beetles, and ballooning spiders.
产卵数	1-3	1-4
Population Trend	—	—

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Habitat Comparison

共同栖息地

🌾 Grassland 🏖️ Coastal

Pacific Swift only

🌲 Forest 🌿 Wetland

Pallid Swift only

无

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Song & Call Comparison

Pacific Swift

鸣唱

Thin, reedy trill with nasal overtone; soft chattering notes delivered continuously during rapid low-level flight over fields.

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

Pacific Swift

Breeds from Siberia and Japan south to China and the Himalayas. Long-distance migrant wintering in Southeast Asia and Australia.

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

Least Concern

Pacific Swift

Least Concern

Pallid Swift

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How to Tell Them Apart

Pacific Swift

羽毛

Dark blackish-brown upperparts; distinctive white rump patch contrasting with dark back; white throat patch; underparts dark with pale brown barring; deeply forked tail; white rump distinguishes it from Common Swift …

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

Pacific Swift

白腰雨燕在西伯利亚至东南亚繁殖，迁徙至澳大利亚越冬，是大型雨燕。

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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