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Side-by-Side Comparison

Attribute	Balearic Shearwater	Newell's Shearwater
Scientific Name	Puffinus mauretanicus	Puffinus newelli
Order	Procellariiformes	Procellariiformes
Family	Procellariidae	Procellariidae
Conservation Status	Critically Endangered	Critically Endangered
Length	—	—
Wingspan	48.4 cm (19.1 in)	48.2 cm (19.0 in)
Weight	514.8 g (18.16 oz)	382.5 g (13.49 oz)
Diet	--	--
Clutch Size	1	1
Population Trend	—	—

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Habitat Comparison

Shared Habitats

None

Balearic Shearwater only

🏖️ Coastal

Newell's Shearwater only

🌲 Forest

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Conservation Status

Critically Endangered

Balearic Shearwater

Critically Endangered

Newell's Shearwater

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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.

Newell's Shearwater

33 cm. Dark above; white below with variable dark markings on flanks and vent. Breeds Kauai and possibly other Hawaiian islands. Endangered; threatened by introduced predators, light attraction, and vehicle strikes. Migrates to western Pacific; feeds on fish and squid.

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