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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Letters

01 June 1948 Comments Letters SIRS,--The Royal Naval Bird-Watching Society has now been in existence for just over a year. I t has some t w o hundred and sixty members drawn from the ranks of t h e Royal Navy, Royal Australian, Canadian and New Zealand Navies. These observers range fr...
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