01 October 1985
Comments Letters Distinction between Mandarin and Wood Duck in female-type plumages. A comprehensive description of differences between Mandarin Aix galericulata and Wood Duck A. sponsa was given by C. Holt {Brit. Birds 11: 227-232). As he noted, however, some of the c...
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01 February 1971
Comments Reviews Signals for Survival. By Niko Tinbergen and Hugh Falkus. Drawings by Eric Ennion. Clarendon Press, Oxford, 1970. 80 pages; 88 photographs; many coloured sketches. £2. Based on the B.B.C. film which won the Italia Prize for documentaries in 1969, thi...
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