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Side-by-Side Comparison

Attribute	Balearic Shearwater	Antarctic Petrel
Scientific Name	Puffinus mauretanicus	Thalassoica antarctica
Order	Procellariiformes	Procellariiformes
Family	Procellariidae	Procellariidae
Conservation Status	Critically Endangered	Least Concern
Length	—	—
Wingspan	48.4 cm (19.1 in)	59.2 cm (23.3 in)
Weight	514.8 g (18.16 oz)	658.3333333333334 g (23.22 oz)
Diet	--	--
Clutch Size	1	1
Population Trend	—	—

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Habitat Comparison

Shared Habitats

None

Balearic Shearwater only

🏖️ Coastal

Antarctic Petrel only

None

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Conservation Status

Critically Endangered

Balearic Shearwater

Least Concern

Antarctic Petrel

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About These Birds

Balearic Shearwater

30–38 cm. Brown above; variably dirty-white to brown below; often shows brown smudging on flanks. Breeds only Balearic Islands, Spain. Critically Endangered with fewer than 3,000 pairs; faces extinction. Migrates to NE Atlantic; threatened by predators, fishing bycatch, and tourist development.

Antarctic Petrel

40–46 cm, wingspan 100–110 cm. Striking chocolate-brown and white pattern; only member of its genus. Breeds solely in Antarctica on cliff ledges; among the most southerly-nesting birds. Feeds on fish and krill beneath pack ice. Returns to colonies in October; one of the most abundant Antarctic seabirds.

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More Birds to Explore

More from Procellariidae

Antarctic Prion Pachyptila desolata Atlantic Petrel Pterodroma incerta Audubon's Shearwater Puffinus lherminieri Bannerman's Shearwater Puffinus bannermani All Procellariidae birds →

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