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Side-by-Side Comparison

属性	Pallid Swift	Plain Swift
学名	Apus pallidus	Apus unicolor
目	Caprimulgiformes	Caprimulgiformes
科	Apodidae	Apodidae
保护状况	Least Concern	Least Concern
体长	—	—
翼展	33.4 cm (13.1 in)	29.9 cm (11.8 in)
体重	42.25 g (1.49 oz)	24.2 g (0.85 oz)
食性	Aerial insectivore foraging continuously in flight, taking tiny flies, beetles, and ballooning spiders.	Exclusively aerial insectivore catching small flying insects and spiders drifting in aerial plankton at altitude.
产卵数	1-4	2
Population Trend	—	—

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Habitat Comparison

共同栖息地

🏖️ Coastal

Pallid Swift only

🌾 Grassland

Plain Swift only

🌲 Forest

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Song & Call Comparison

Pallid Swift

鸣唱

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

Plain Swift

鸣唱

Harsh, grating scream with descending inflection; loud raspy calls carrying urgency, often given during colony disturbance.

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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.

Plain Swift

Breeds on the Azores, Madeira, and Canary Islands. Resident on these Macaronesian archipelagos. Closely related to Common Swift.

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保护状况

Least Concern

Pallid Swift

Least Concern

Plain Swift

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How to Tell Them Apart

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 …

Plain Swift

羽毛

Dark sooty-brown plumage; very faint pale chin; no distinct throat patch; entirely plain and uniform; smaller than Common Swift; Macaronesian endemic breeding in Canary Islands and Madeira; coloration slightly paler …

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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。

Plain Swift

单色雨燕在大西洋岛屿和非洲西北部繁殖，具有黑褐色羽毛。

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