Common Tern ageing

01 June 2001
Comments Main paper Large numbers of Common Terns Sterna hirundo of known age were studied during the breeding season at Seaforth Nature Reserve, Liverpool, Merseyside. Detailed observations of key plumage and bare-part features were recorded, and compared with pub...
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Mystery photographs: Common Tern

01 April 1979
Comments Main paper Slender, pointed wings, neat, black cap and forked tail clearly indicate an adult tern. The grey underparts, separated from the cap by a white streak, may initially suggest Whiskered Tern Chlidonias hybridus, but the underparts are too pale for a ...
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