Letters

01 May 1979 Comments Letters A symbol for individuals not adult males The present biological symbols ♂ and ♀ indicate the two sexes, male and female. The suggested introduction of a third symbol {Brit. Birds 71: 544-545) seems strangely illogical. If the...
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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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