Letters

01 May 1978
Comments Letters Field identification of Black-throated Diver in winter Mystery photograph 14 (Brit. Birds 71: 34) was very interesting and instructive. It illustrated clearly the distinctive white thigh patch of Black-throated Diver Gavia arctica, which I have...
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Letters

01 June 1955
Comments Letters Uses of photography and sound-recording to reinforce sight records of unusual birds Sirs,--Your editorial on sight records of unusual birds (Brit. Birds, 55: 557-560), though comprehensive, omits reference to the value of reinforcing such records by photo...
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