Movements and mortality patterns of North Atlantic Puffins as shown by ringing

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Abstract
Most puffin recoveries are of birds washed up on beaches, but numbers of immatures are shot and caught in fishing nets. There is a peak of adult mortality in the late winter when birds are migrating or in flightless moult. Birds of most populations disperse widely but there are some population differences, e.g., east British [UK] birds do not travel very far south, few west British birds enter the North Sea. Puffins from east Britain used to remain within the North Sea but recently increasing numbers have been recovered further south. Puffins are mainly pelagic during the winter and ringing recoveries are unlikely to show the main wintering areas.

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