Letters

01 August 1994
Comments Letters Those Ruddy Ducks. The status of the Ruddy Duck Oxyura jarnaicensis seems to be causing much heartache among birdwatchers at present (e.g. Brit. Birds 86: 338). The fact that it has started to hybridise with the small population of the endangered ...
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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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