Letters

01 December 2001 Comments Letters When watching House Martins Delichon urbica in 1967, I wrote in my notebook: `Is the mud for the structure of their nests carried on, rather than in, their beaks?'. My impression then was that the birds carried up the mud on the beak, and pressed it in...
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Letters

01 February 1962 Comments Letters What is a British bird ? Sirs,--The recent note and subsequent correspondence on the occurrence of a White-throated Sparrow (Zonotrichia albkollis) in Hampshire {Brit. Birds, 54: 366-367 and 439-440) prompts once more the question: what is a British bird?...
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