143946 Goldeneye Bucephala clangula L 42-50cm. Compact diving duck. Both sexes are easily recognised. In flight, all birds show white on inner wings (extent greatest in males). Sexes are dissimilar in other respects. Adult male has mainly black and white plumage. Rounded and peaked, green-glossed head has yellow eye and striking white patch at base of bill. In eclipse, resembles an adult female but retains his more striking white wing pattern. Adult female has mainly grey-brown body, pale neck, dark brown head and yellow eye. Juvenile is similar to adult female but with dark eye. Voice Displaying male utters squeaky calls and rattles. Status Scarce breeding species, mainly in N. Locally common in winter, mostly on estuaries but also on inland lakes and flooded gravel pits.