The CHAUNA, or TSCHAJA (_Chauna Chavaria_), has a horn upon the brow, but a shorter beak than the Aniuma; the bridles are bare, the nape decorated with a crest, and the plumage soft, but not of velvety texture, on the head and neck. The feathers of the crest and on the crown are grey, those on the cheeks, throat, and upper neck white, those of the mantle brown, of the nape and upper breast deep greyish blue. The edges of the wings, the lower wing-covers, and feathers on the rump and belly are whitish. The eyes are yellow, and the bridles and bare eye-rings flesh-red; the beak is black, and the foot light red. This species is thirty-two inches, the wing measures nineteen, and the tail eight inches. The Chaunas are peculiar to the northern parts of South and Central America, where they frequent marshes, or occasionally river-banks, either in pairs or small parties. Their manners are shy, and when not disturbed their gait is stately and slow. In the air their movements are easy and swift, but they are unable to run without the assistance of their wings; when about to rest, they resort to the branches of high trees. According to Gray, these birds are kept by the natives with their poultry, going with them to feed about the neighbourhood during the day, and proving very useful in defending the fowls, by the aid of their spurs, from the attacks of the numerous feathered tyrants with which the country is infested. Marshy or inundated localities are the situations they principally frequent, as their food consists entirely of the leaves of aquatic plants, grapes, and seeds. The spacious nest is made of small branches, and is usually placed in a bush surrounded by water, or among reeds and rushes. The eggs are two in number, and have a rough white shell. According to Gray, if the living bird be handled, a peculiar crackling is felt, which is caused by the quantity of air lodged between the skin and the muscles. * * * * *