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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Letter

01 September 1946 Comments Letters SIRS,--In t h e course of a study of t h e breeding population of Oystercatchers (Hmmatopus ostralegms occidenialis) on the islands of Skomer and Skokholm this year we have ringed a number of chicks with coloured rings. Though the main purpose of this has...
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