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Side-by-Side Comparison

Attribute	Spectacled Guillemot	Thick-billed Murre
Scientific Name	Cepphus carbo	Uria lomvia
Order	Charadriiformes	Charadriiformes
Family	Alcidae	Alcidae
Conservation Status	Least Concern	Least Concern
Length	—	—
Wingspan	38.4 cm (15.1 in)	41.4 cm (16.3 in)
Weight	480.0 g (16.93 oz)	945.75 g (33.36 oz)
Diet	--	--
Clutch Size	1-2	1
Population Trend	—	—

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Habitat Comparison

Shared Habitats

🏖️ Coastal

Spectacled Guillemot only

None

Thick-billed Murre only

None

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Conservation Status

Least Concern

Spectacled Guillemot

Least Concern

Thick-billed Murre

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About These Birds

Spectacled Guillemot

Spectacled Guillemot, 36–38 cm, breeds on rocky coasts and sea cliffs of the western North Pacific from Kamchatka to Japan. Sooty black with white spectacle patches around the eye; red feet. Coastal diver; feeds on fish and crustaceans near rocky reefs. Sedentary; stays close to breeding coast year-round.

Thick-billed Murre

Thick-billed Murre (Brünnich's Guillemot), 39–43 cm, breeds in enormous cliff colonies across the Arctic from Newfoundland to Siberia. Thicker, shorter bill with white gape line. Dives to 200+ m — deepest diver among alcids. Piscivore; takes capelin, cod. Vulnerable to climate change in the High Arctic.

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