The Muscovy Duck is, as has been stated, of a different species from our other useful breeds. It is a native of South America and is supposed to have been taken to Europe in the seventeenth century. It was probably brought to North America from Europe less than a hundred years ago. It differs from ducks of Mallard origin in several other particulars besides the naked head with its bright-red, carunculated skin. The male is very much larger than the female. The tail is longer and more depressed. There is an entire absence of red pigment in the plumage. The natural color is black and white, unevenly distributed. This variety is called the Colored Muscovy Duck. Many specimens are nearly black. The White Muscovy Duck is an albino variety. By crossing these two varieties a blue variety is sometimes obtained, but, although Blue Muscovy Ducks have been made at various times, fanciers have never taken enough interest in them to encourage the originators to continue their breeding. The Rouen Duck takes its name from the town of Rouen, in the north of France, though the type seems to have been common over quite a large area and not peculiar to the vicinity of that town. It is like the Mallard in color, and is just such a duck as by good care and selection for size might be developed at any time from common ducks of that color. Rouen Ducks are said to have been well known in the south of England early in the nineteenth century. When they were brought to this country is not known. Although for a long time they have been familiar to those who attend poultry shows, and have been widely distributed in small numbers, they have never been extensively bred because the Rouen, having dark plumage, is not desirable for the production of young ducks for market. When mature it dresses clean and the quality of its flesh is unsurpassed. [Illustration: Fig. 124. Rouen Ducks, Brook View Farm, Newbury, Massachusetts] The Cayuga Duck is an improved black duck developed about the middle of the last century in Cayuga County, New York. Some early accounts of its origin stated that it was a domesticated wild black duck, but it is much more reasonable to suppose that it was developed by selection from black and nearly black common ducks. [Illustration: Fig. 125. Flock of Pekin Ducks]