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Side-by-Side Comparison

Attribute	Ringed Storm-petrel	Least Storm-petrel
Scientific Name	Hydrobates hornbyi	Hydrobates microsoma
Order	Procellariiformes	Procellariiformes
Family	Hydrobatidae	Hydrobatidae
Conservation Status	Near Threatened	Least Concern
Length	—	—
Wingspan	32.6 cm (12.8 in)	23.8 cm (9.4 in)
Weight	39.25 g (1.38 oz)	18.0 g (0.63 oz)
Diet	--	--
Clutch Size	1	1
Population Trend	—	—

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Habitat Comparison

Shared Habitats

None

Ringed Storm-petrel only

🏜️ Desert

Least Storm-petrel only

None

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Conservation Status

Near Threatened

Ringed Storm-petrel

Least Concern

Least Storm-petrel

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About These Birds

Ringed Storm-petrel

Ringed Storm-petrel, 21–23 cm, is an extremely poorly known species with a highly restricted range over the Humboldt Current off Peru and Chile. White underparts with a distinctive dark breast band — giving the 'ringed' appearance. Breeding grounds unknown until recently; likely nests in Atacama Desert.

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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More Birds to Explore

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