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Golden Oriole - Oriolus oriolus - male. L 22-24cm. Stunning and unmistakable but heard more often than it is seen. Sexes are dissimilar. Adult male has mainly bright yellow plumage with black on wings and tail. Bill is red. Adult female is similar but duller and paler below, with some streaking. Juvenile is similar to adult female but upperparts are green and underparts are more heavily streaked. Voice Song is fluty and tropical-sounding wee-lo- weeow. Utters harsh cat-like calls in alarm. Status Regular passage migrant and scarce breeder; nests in poplar plantations in E Anglia.