Uncompleted moult in Sterna terns and the problem of identification
01 January 1969
Main paper
From 23rd June to 18th July 1966 we and others regularly watched a Sterna in an unfamiliar plumage among the gulls and terns feeding at the offshore outflow from the power station at Dungeness, Kent. From 16th May to 8th July 1967 there were two simila...
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