Letters

01 December 1988
Comments Letters The identity of 'Mystery photograph 97'. In the light of 25 years' experience in studying Aythya hybrids, I do not consider that the bird in mystery photograph 97 {Brit Birds 77: plate 254; 78: plate 19; 81: plate 343) is a Tufted Duck A. fuligula X Po...
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Letters

01 February 1988
Comments Letters F i e l d identification o f black-headed Yellow Wagtails When discussing races of the Yellow Wagtail Motacillajlava, Martin van den Berg and Gerald Oreel (Brit. Birds 78: 176-183) claimed that 'most records of jeldegg in western E u r o p e probably resu...
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Letters

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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Letters

01 December 1956
Comments Letters I N T E R P R E T A T I O N O F V A R I A T I O N AMONG T H E YELLOW WAGTAILS S I R S , -- May I ask a little of your space in which to comment on some points in Dr. Mayr's summing-up (antea, pp. 115-119) of our present state of knowledge of the Yellow Wa...
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