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 1985
Comments Letters Distinction between Mandarin and Wood Duck in female-type plumages. A comprehensive description of differences between Mandarin Aix galericulata and Wood Duck A. sponsa was given by C. Holt {Brit. Birds 11: 227-232). As he noted, however, some of the c...
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