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 January 1955
Comments Letters " A N T I N G " BY B I R D S S I R S , -- T h e announcement by the Editors of British Birds (antea, vol. xlvii, p p . 312-313), based on the work of H . Poulsen, that " a n t i n g " by birds is "quite a u t o m a t i c " and is merely performed to rub o...
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