Alfred Newton, 1911 Encyclopædia Britannica, Volume 26… (1911)
“ While the female presents the usual inconspicuous mottled plumage of the same sex in most species of Anatinae, the male is one of the handsomest of his kind. His deep chestnut head and throat are diversified on either side by a line of buff, which, springing from the gape, runs upward to the eye, in front of which it forms a fork, one prong passing backward above and the other below, enclosing a dark glossy-green patch, and both losing themselves in the elongated feathers of the hind-head and nape. ”
