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Side-by-Side Comparison

Attribute	Band-rumped Storm-petrel	Least Storm-petrel
Scientific Name	Hydrobates castro	Hydrobates microsoma
Order	Procellariiformes	Procellariiformes
Family	Hydrobatidae	Hydrobatidae
Conservation Status	Least Concern	Least Concern
Length	—	—
Wingspan	30.1 cm (11.9 in)	23.8 cm (9.4 in)
Weight	49.25 g (1.74 oz)	18.0 g (0.63 oz)
Diet	--	--
Clutch Size	1	1
Population Trend	—	—

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Conservation Status

Least Concern

Band-rumped Storm-petrel

Least Concern

Least Storm-petrel

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About These Birds

Band-rumped Storm-petrel

Band-rumped Storm-petrel, 19–21 cm, breeds on Atlantic and Pacific volcanic islands including the Azores, Canaries, and Galápagos. Sooty brown with a white rump band; similar to Leach's but straighter wingtips and steadier flight. Multiple cryptic species may be involved. Planktivore; widespread pelagic.

Least Storm-petrel

World's smallest seabird at 13–15 cm. Sooty-black with white rump; short rounded wings. Breeds Baja California islands; ranges offshore in eastern Pacific to Ecuador. Feeds on zooplankton and small fish by pattering on the surface. Nocturnal at breeding colonies; Near Threatened.

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