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Tufted Duck Aythya fuligula L 40-47cm. Familiar diving duck. Tufted crown useful in identification. Gregarious in winter. In flight, note white wingbar. Sexes are dissimilar in other regards. Adult male has mainly black and white plumage; purplish sheen on head seen in good light. Has yellow eye and black-tipped blue-grey bill. In eclipse, white elements of plumage are buffish brown. Adult female has mainly brown plumage, palest on flanks and belly. Has white at base of bill (less than female Scaup), yellow eye and black-tipped blue-grey bill. Juvenile is similar to adult female but with duller colours. Voice Male utters a soft peep. Status Common year-round on lakes, reservoirs and flooded gravel pits.. Several thousand pairs breed; winter numbers boosted dramatically by migrants from mainland Europe.