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 1963
Comments Letters SIRS,--Having paid some attention to t h e manner in which t h e face of t h e Rook becomes bare, I m a y state t h a t in t h e main m y observations a n d specimens confirm Mr. Witherby's conclusions. But, with regard to this species n o t breeding in t...
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