sentences:  The male has the forehead and crown with the crest brilliant yellow; the whole upper plumage, sides of the head and neck, chin, throat, and breast deep black glossed with green, the edges of the feathers of the upper plumage with a metallic lustre, and the outermost tail-feathers tipped with white; lower plumage from the breast downwards deep yellow, the thighs barred or mottled with white.The recumbent crest is raised when the bird is alert or alarmed.The female has the yellow parts duller; the upper plumage and sides of the head dark greenish-brown; the chin and throat glossed dark olive-green; wings and tail dull black; the feathers of the upper plumage edged with metallic green.