Letters

01 May 2000 Comments Letters The dramatic decline in the numbers of House Sparrows Passer domesticus in the centre of London over the past 20 or so years is well documented and generally accepted (Summers-Smith 1999). Indeed, the matter of the decrease has already been raised twic...
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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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