Opinions expressed in this feature are not necessarily those of 'British Birds',

Scaly-sided Merganser study/ The Scaly-sided Merganser Mergus squamatus, with a population estimated at only around 1,000 birds, is one of the world's rarest wildfowl. It breeds in the mountainous forests of the Bikin River system in the Ussuri region of the Soviet Far East, where numbers are believed to have fallen by

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