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Wigeon - Mareca penelope - male. L 45-47cm. Males are colourful and attractive. Forms large flocks outside breeding season. Sexes are dissimilar. Adult male has mainly orange-red head with yellow forehead. Breast is pinkish; rest of plumage is mainly finely marked grey except for white belly and black and white stern. In flight, has white patch on wing. Bill is pale grey and dark-tipped. In eclipse, resembles an adult female although white wing patch is still evident. Adult female is mainly reddish brown, darkest on head and back. Note, however, the white belly and stern. In flight, lacks maleâ€™s white wing patch. Bill is grey and dark-tipped. Juvenile resembles adult female. Voice Male utters evocative wheeeoo whistle.