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Side-by-Side Comparison

Attribute	European Storm-petrel	Wedge-rumped Storm-petrel
Scientific Name	Hydrobates pelagicus	Hydrobates tethys
Order	Procellariiformes	Procellariiformes
Family	Hydrobatidae	Hydrobatidae
Conservation Status	Least Concern	Least Concern
Length	—	—
Wingspan	23.8 cm (9.4 in)	26.0 cm (10.2 in)
Weight	26.5 g (0.93 oz)	27.0 g (0.95 oz)
Diet	--	--
Clutch Size	1	1
Population Trend	—	—

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Conservation Status

Least Concern

European Storm-petrel

Least Concern

Wedge-rumped Storm-petrel

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About These Birds

European Storm-petrel

European Storm-petrel, 14–18 cm, wingspan 36–39 cm, is the smallest seabird in European waters, breeding in burrows and rock crevices on Atlantic islands from Iceland to the Mediterranean. Entirely sooty black with white rump. Strictly nocturnal at colonies. Planktivore; patters over wave surface picking up oil and plankton.

Wedge-rumped Storm-petrel

Wedge-rumped Storm-petrel, 19–21 cm, breeds in enormous colonies in the Galápagos and on islands off Peru. The largest white rump patch of any storm-petrel — nearly triangular, extending to the uppertail coverts. Unlike most storm-petrels, daytime activity at colonies. Planktivore in eastern Pacific upwelling.

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