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Side-by-Side Comparison

Attribute	Grey-backed Storm-petrel	Wilson's Storm-petrel
Scientific Name	Garrodia nereis	Oceanites oceanicus
Order	Procellariiformes	Procellariiformes
Family	Oceanitidae	Oceanitidae
Conservation Status	Least Concern	Least Concern
Length	—	—
Wingspan	25.0 cm (9.8 in)	29.4 cm (11.6 in)
Weight	32.5 g (1.15 oz)	37.5 g (1.32 oz)
Diet	--	--
Clutch Size	1	1
Population Trend	—	—

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Habitat Comparison

Shared Habitats

None

Grey-backed Storm-petrel only

🌾 Grassland

Wilson's Storm-petrel only

None

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Conservation Status

Least Concern

Grey-backed Storm-petrel

Least Concern

Wilson's Storm-petrel

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About These Birds

Grey-backed Storm-petrel

Grey-backed Storm-petrel, 16–19 cm, breeds on sub-Antarctic islands across the Southern Ocean from Tristan da Cunha to the Antipodes. Pale grey back and rump distinguishes it from most other storm-petrels. Planktivore; flutters low over the sea surface picking up zooplankton.

Wilson's Storm-petrel

Wilson's Storm-petrel, 15–19 cm, wingspan 38–42 cm, may be the world's most abundant bird with billions breeding on Antarctic and sub-Antarctic islands. Dark brown with white rump, yellow-webbed feet dangling below body while 'walking' on water surface. Planktivore; skims copepods and krill. Circumglobal migrant.

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More Birds to Explore

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Black-bellied Storm-petrel Fregetta tropica New Caledonian Storm-petrel Fregetta lineata New Zealand Storm-petrel Fregetta maoriana Pincoya Storm-petrel Oceanites pincoyae All Oceanitidae birds →

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