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Side-by-Side Comparison

Attribute	White-bellied Storm-petrel	Grey-backed Storm-petrel
Scientific Name	Fregetta grallaria	Garrodia nereis
Order	Procellariiformes	Procellariiformes
Family	Oceanitidae	Oceanitidae
Conservation Status	Least Concern	Least Concern
Length	—	—
Wingspan	33.7 cm (13.3 in)	25.0 cm (9.8 in)
Weight	53.9 g (1.90 oz)	32.5 g (1.15 oz)
Diet	--	--
Clutch Size	1	1
Population Trend	—	—

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Habitat Comparison

Shared Habitats

🌾 Grassland

White-bellied Storm-petrel only

None

Grey-backed Storm-petrel only

None

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Conservation Status

Least Concern

White-bellied Storm-petrel

Least Concern

Grey-backed Storm-petrel

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About These Birds

White-bellied Storm-petrel

White-bellied Storm-petrel, 18–21 cm, breeds on sub-Antarctic and South Atlantic islands; pelagic across the Southern Ocean in winter. White belly contrasts with dark breast band and dark upperparts; pale at base of rump. Planktivore; patters over sea surface. Often seen in the company of Wilson's Storm-petrel.

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.

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More Birds to Explore

More from Oceanitidae

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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