COSEWIC Status Reports

COSEWIC Update Status Report on the Roseate Tern (Sterna dougallii) in Canada

The Canadian population of Roseate Terns was estimated at 101-125 pairs between 1982-1985, which constituted 3% of the northeastern population (~3100 pairs). While the number of Roseate Terns in Canada had probably always been small, it appeared as though the population had declined since the 1930s. The two most important factors limiting the distribution and abundance of Roseate Terns in northeastern North America were thought to be trapping of adults on the wintering grounds for sale at local markets, and predation and displacement by gulls on the breeding grounds. Roseate Terns were designated as threatened by the Committee on the Status of Endangered Wildlife in Canada (COSEWIC) in 1986. Since the original COSEWIC designation, a number of studies have provided new information on Roseate Terns in Canada.

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Contact Person(s)

COSEWIC Secretariat
c/o Canadian Wildlife Service
Environment Canada
Ottawa, ON
K1A 0H3
Tel: 819-938-4125
Fax: 819-938-3984
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