Letters

01 February 1964
Comments Letters 'Industrial' discoloration of House Sparrows Sirs,--I was rather interested in Ian Woodward's suggestion (Brit. Birds, 56: 470-471), following my note on 'industrial' discoloration of House Sparrows Passer domestkus {Brit. Birds, 56: 296-297), that white ...
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Letters

01 August 1952
Comments Letters SIRS,--The Ibis for April 1953 will include a group of papers on Visible Migration (particularly in passerine birds) as observed in various countries. The newly-formed Sub-committee on Visible Migration of the British Trust for Ornithology (see below) fee...
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