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Side-by-Side Comparison

Attribute	Black Storm-petrel	Least Storm-petrel
Scientific Name	Hydrobates melania	Hydrobates microsoma
Order	Procellariiformes	Procellariiformes
Family	Hydrobatidae	Hydrobatidae
Conservation Status	Least Concern	Least Concern
Length	—	—
Wingspan	34.4 cm (13.5 in)	23.8 cm (9.4 in)
Weight	66.19999999999999 g (2.34 oz)	18.0 g (0.63 oz)
Diet	--	--
Clutch Size	1	1
Population Trend	—	—

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Conservation Status

Least Concern

Black Storm-petrel

Least Concern

Least Storm-petrel

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About These Birds

Black Storm-petrel

Black Storm-petrel, 22–23 cm, is the largest entirely dark storm-petrel of the eastern Pacific, breeding on San Benito Islands and Coronado Islands off Baja California. Deeply forked tail; languid, loping flight distinctive among storm-petrels. Planktivore and piscivore. Near Threatened; small breeding population.

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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