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Ferruginous Duck - Aythya ferruginea. L 38-42cm. Attractive diving duck. In flight, all birds show striking white wingbar on upperwing, white underwings and white belly. In all birds, cap is peaked and bill is mainly grey; pale band separates grey from dark tip. Sexes are separable with care. Adult male has rich, reddish brown plumage, darkest on back, almost black on rump and tail. Has white stern and white belly (latter only visible in flight) and white eye. Adult female is similar to adult male but reddish colouration is duller and eye is dark. Juvenile is similar to adult female but duller colours. Voice Mostly silent. Status Scarce visitor, mainly outside breeding season. Species’ status is confused by presence of undoubted escapees from captivity. Favours lakes and flooded gravel pits.