Letters

01 December 1998 Comments Letters Many papers have been written about waterfowl hybrids and a lot of information is available, but there is still great interest in the subject because of identification difficulties and possible confusion with potential vagrants (Perrins 1961--but still...
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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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