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Side-by-Side Comparison

Attribute	Matsudaira's Storm-petrel	Least Storm-petrel
Scientific Name	Hydrobates matsudairae	Hydrobates microsoma
Order	Procellariiformes	Procellariiformes
Family	Hydrobatidae	Hydrobatidae
Conservation Status	Vulnerable	Least Concern
Length	—	—
Wingspan	37.0 cm (14.6 in)	23.8 cm (9.4 in)
Weight	62.0 g (2.19 oz)	18.0 g (0.63 oz)
Diet	--	--
Clutch Size	--	1
Population Trend	—	—

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Conservation Status

Vulnerable

Matsudaira's Storm-petrel

Least Concern

Least Storm-petrel

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About These Birds

Matsudaira's Storm-petrel

Matsudaira's Storm-petrel, 24–26 cm, is a large, all-dark storm-petrel breeding on Volcano and Ryukyu Islands of Japan. Long-winged, slow flapping flight. Winters off East Africa and the Arabian Sea — an Indian Ocean migrant from North Pacific colonies. Planktivore and surface feeder.

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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