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 October 2000
Comments Letters The RSPB agrees with Bernard Zonfrillo (Brit. Birds 93: 394-396) that the world is not ideal, but believes that some of his other comments are misplaced. Globally, introductions are a major cause of biodiversity loss (Vitousek et al. 1997) and pose a s...
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