Beak and basal knob bright red; head and upper neck dark glossy green, followed by a white collar, below which is a chestnut band; wing-coverts white; speculum green; scapulars, part of the secondaries, and the primaries black; rump, upper tail-coverts, and tail-feathers white, the latter tipped with black; lower, central line of the breast and belly dark brown, the rest of the under parts white; legs and feet pink. Length, twenty-six inches. The female is without the knob at the base of the bill, and her colours are not so bright. * * * * * The sheldrakes, or sheld-ducks, are curious and interesting birds, and form a connecting-link between the geese and ducks; but they are more like the former than the latter, and sheld-gander, or sheldgoose, would perhaps be a more suitable name. The common sheldrake is, perhaps, the most duck-like in appearance of all the birds of this genus, and the common name, sheld, which means parti-coloured, really applies to this species only. As in the geese, the male and female sheld-ducks are nearly alike in plumage, and the male does not change colour; and, like the gander, he assists his mate in rearing the young. In the true ducks the drake changes his plumage in summer, becoming like the female in colour, and in most cases (for there are exceptions) he remains apart from the duck from the time that incubation begins until the young are fully grown. Of the seven known species of sheldrake, only one is indigenous to the British Islands. A second species, the ruddy sheldrake (_Tadorna casarca_), is a rare visitor, or straggler, to our coasts, and it is probable that most of the sheldrakes of this species that are shot from time to time in England are escaped birds.