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 Pochard A. ferina hybrid as defined by Gillham et al. (1966). The head-shape and bill-tip are, as stated, perhaps reminiscent of a male Ring-necked
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