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Side-by-Side Comparison

Attribute	Scopoli's Shearwater	Balearic Shearwater
Scientific Name	Calonectris diomedea	Puffinus mauretanicus
Order	Procellariiformes	Procellariiformes
Family	Procellariidae	Procellariidae
Conservation Status	Least Concern	Critically Endangered
Length	—	—
Wingspan	68.8 cm (27.1 in)	48.4 cm (19.1 in)
Weight	707.0 g (24.94 oz)	514.8 g (18.16 oz)
Diet	--	--
Clutch Size	1	1
Population Trend	—	—

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Habitat Comparison

Shared Habitats

None

Scopoli's Shearwater only

None

Balearic Shearwater only

🏖️ Coastal

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Conservation Status

Least Concern

Scopoli's Shearwater

Critically Endangered

Balearic Shearwater

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About These Birds

Scopoli's Shearwater

45–56 cm, wingspan 112–122 cm. Large; brown-grey above with yellow bill; white below. Breeds Mediterranean islands; migrates to Atlantic. Formerly lumped with Cory's Shearwater; distinguished by smaller size and more restricted breeding range. Feeds on fish and squid.

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.

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