- Alca torda
L. 37–39 cm (14½-15¼ in)
W. 60-69 cm
- Black upperparts
- White breast and belly
- Thick, black bill with blunt end
- White stripes on bill
- White line from eye to base of the bill
- Long, pointed tail
- Black face becomes white
Common Guillemot, which has a long pointed bill.
Northern Atlantic coasts, in eastern North America as far south as Maine, and in western Europe from northwestern Russia to northern France.
Two subspecies are recognized:
- A. t. torda - Northeast North America, Scandinavia to Murmansk and White Sea
- A. t. islandica - Iceland and British Isles to France; migrates to Mediterranean in winter.
Breeds on islands, rocky shores and steep cliffs, usually at a lower level to the Common Guillemot. Winters on the open sea and in large estuaries.
Flies fast and direct low over water.
In colonies with eggs laid on a bare rock ledge
Swims underwater to forage for food. Eats sand eels, herring, some crustaceans and marine worms.
A querrulous, croaking kaargh
- Del Hoyo, J, A Elliott, and D Christie, eds. 2007. Handbook of the Birds of the World. Volume 12: Picathartes to Tits and Chickadees. Barcelona: Lynx Edicions. ISBN 978-8496553422
- Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2017. The eBird/Clements checklist of birds of the world: v2017, with updates to August 2017. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
- Collins Pocket Guide to British Birds 1966
- Collins Field Guide 5th Edition
- Collins Bird Guide ISBN 0 00 219728 6
- BirdForum Opus contributors. (2023) Razorbill. In: BirdForum, the forum for wild birds and birding. Retrieved 7 June 2023 from https://www.birdforum.net/opus/Razorbill
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