- Length: 14 inches
- Sexes similar
- Immature like basic-plumaged adult but bill thinner
- Large alcid that dives for food from water surface
- Heavy, dark bill traversed by white lines
- Pointed tail
- Thin white trailing edge to secondaries visible at rest
- Pelagic bird only coming ashore to breed
- Black head, neck, back, wings, and tail
- White breast, belly, and undertail coverts
- White chin and throat
- Less crisp division between upperparts and underparts
Murres are perhaps most similar to Razorbills but have thinner bills,
rounded tails, and dusky flanks. Basic-plumaged Atlantic Puffins also have
large bills but have an obvious face pattern.
Length and wingspan from: Robbins, C.S., Bruun, B., Zim, H.S., (1966). Birds of North America. New York: Western Publishing Company, Inc.