Letters

01 June 1973 Comments Letters Wallcreeper on migration in the Netherlands Dr H. Lohrl's statement (Brit. Birds, 63 : 167) that the Wallcreeper Tichodroma muraria is non-migratory has been challenged by David Elias, H. G. Alexander, Guy Mountfort and K. D. Smith (Brit. Birds...
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Letters

01 December 1955 Comments Letters Further remarks on discoloration in House Sparrows Sirs,--The observations of C. J. O. Harrison (Brit. Birds, 56: 296-297) on 'industrial' discoloration in House Sparrows (Passer domesticus) and other birds prompt us to record information on an allied pro...
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