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Side-by-Side Comparison

Attribute	White-bellied Storm-petrel	Pincoya Storm-petrel
Scientific Name	Fregetta grallaria	Oceanites pincoyae
Order	Procellariiformes	Procellariiformes
Family	Oceanitidae	Oceanitidae
Conservation Status	Least Concern	Data Deficient
Length	—	—
Wingspan	33.7 cm (13.3 in)	26.7 cm (10.5 in)
Weight	53.9 g (1.90 oz)	26.0 g (0.92 oz)
Diet	--	--
Clutch Size	1	1
Population Trend	—	—

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Habitat Comparison

Shared Habitats

None

White-bellied Storm-petrel only

🌾 Grassland

Pincoya Storm-petrel only

🏖️ Coastal

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Conservation Status

Least Concern

White-bellied Storm-petrel

Data Deficient

Pincoya 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.

Pincoya Storm-petrel

Pincoya Storm-petrel, 16–18 cm, was described as a new species only in 2013 from the Chiloé Archipelago of Chile. One of the most recently discovered birds in the Americas. Dark with white belly patch. Breeds in Chilean fjords — unusual for storm-petrels. Forages over cold sub-Antarctic coastal waters.

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More Birds to Explore

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Black-bellied Storm-petrel Fregetta tropica Grey-backed Storm-petrel Garrodia nereis New Caledonian Storm-petrel Fregetta lineata New Zealand Storm-petrel Fregetta maoriana All Oceanitidae birds →

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