The GLAREOLA, or SEA PARTRIDGE (_Glareola perdix_), has the bill short and curved, the tarsi long and slender, the middle toe joined to the outer by a small membrane, the wings long and pointed, the tail forked. They live in flocks on the banks of the Danube, the Volga, and on the shores of the Black and Caspian Seas. They feed on worms, water-insects, and especially locusts, which they catch on the wing. The JACANAS or PARRÆ are characterised by a straight and middle-sized bill; legs armed with pointed spurs; toes furnished with long and sharp-pointed claws, and a back toe longer even than the front ones. These birds inhabit Asia, Africa, and South America. In Brazil they are called "Surgeon-birds," from the resemblance the claw on their back toe bears to a lancet. They frequent swamps, lagoons, and the margins of pools. They walk on the wide-spreading leaves of tropical aquatic plants with perfect ease, although they swim very imperfectly: some naturalists, indeed, declare that they cannot swim at all, and they are probably justified in this opinion by the appearance of the bird, which seems to have few characteristics of an aquatic species. Their flight is rapid, but not very high. [Illustration: Fig. 122.--Jacana (_Parra africana_, Sw.).] The Jacanas live in pairs. They are exceedingly numerous, and perfectly fearless of man. They are restless and quarrelsome in their nature, frequently engaging in conflict with other birds, when they make good use of their spurs. They will defend their offspring with daring courage even against man himself, and will sacrifice their lives without hesitation in their defence. The male and the female evince the tenderest mutual attachment; once united, they part no more during life. They make their nest in a clump of flags or other aquatic plants, in which the female lays four or five eggs, on which she sits during the night only, the high temperature produced by a tropical sun supplying the necessary warmth. As soon as hatched the young ones leave the nest, and are able to follow their parents about. [Illustration: Fig. 123.--Horned Screamer or Kamichi (_Palamedea cornuta_, Sw.).] The Common Jacana is black, with neck and shoulders of a reddish brown, and green wing-feathers. [Illustration: Fig. 124.--Faithful Kamichi (_Palamedea cristata_, Sw.).]