
Common Murre (also known as the Uria aalge or thin-billed murre)
Kingdom: Animalia, Phylum: Chordata, Class: Aves, Order: Charadriiformes, Family: Alcidae, Genus: Uria, Species: U. aalge
Family: Alcidae (Auks, Murres, and Puffins)
- Shape
- Symmetrical vane with a rounded tip, short and somewhat broad outline.
- Size
- Approximately 2 inches long, consistent with a small body or flank contour feather typical of the species.
- Rarity
- Common
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Description
The Common Murre is a large, dark-backed auk with a tuxedo-like appearance, white underparts, and a sharp, dagger-like bill. They spend most of their lives at sea, coming ashore only to breed on crowded, narrow rocky ledges on coastal cliffs.
Colour & Pattern
Strikingly bicolored with deep chocolate-brown to blackish zones sharply contrasting with a broad, clean white diagonal stripe or wedge extending toward the tip, bordered by pale buff or whitish tips.
Barb Structure
Pennaceous upper portion with a plumulaceous (fluffy) downy base near the calamus. Barbs are intact with standard hooklets.
Texture & Surface
Smooth and firm in the upper pennaceous section for waterproofing, soft and downy at the base for thermal insulation.
Key Features
Distinctive bold contrast of dark brown/black and clean white forming a wedge or stripe pattern on a small, rounded contour feather.
Habitat
Marine pelagic environments, rocky cliffs, coastal waters, and offshore islands during the breeding season.
Geographic Range
Circumpolar distribution in cold northern oceans, breeding along coasts and islands of the North Atlantic and North Pacific, including extensive populations along the coast of Alaska down to California.
Ecological Role
Important marine apex predator and forage fish consumer, serving as an essential bioindicator of ocean health and forage fish abundance in northern marine ecosystems.
Similar Species
Pigeon Guillemot (Cepphus columba) and Thick-billed Murre (Uria lomvia), distinguished by subtle differences in exact patterning, coloration, and geographic context.
Interesting Facts
Common Murres lay single, highly pointed pyriform eggs on bare rock ledges; the pear shape prevents the egg from rolling off cliff edges, instead causing it to spin in a tight circle if disturbed.
Condition Notes
Good condition, fresh with intact barbs and a clean structural pattern showing minimal wear.
Notes
Soldotna, AK 2 inches long