Aspects of the ecology of the black-headed gull (Larus ridibundus) with comparative data on the common gull (L. canus)
Between 1982 and 1984, 893 Black-headed and 117 Common Gulls were trapped outside the breeding season in northeast England, and individually marked with wingtags or colour-rings. About 40% of marked adult Black-headed and Common Gulls returned to the study area in subsequent years, although adult Bl...
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Durham University
1987
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| Online Access: | http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374063 |