Humboldt tells us that the Cock of the Rock is much valued by the Indians as a domestic favourite, and is kept by them in cages made of the stalks of palm-leaves. [Illustration: THE COCK OF THE ROCK (_Rupicola crocea_).] Another very similar species, found only in Peru, the Peruvian Cock of the Rock (_Rupicola Peruana_), lives entirely amongst trees, upon the berries and fruits of which it subsists; but it exhibits none of the dancing propensities of its Brazilian relative. We learn from Tschudi that in no instance did he ever see one of these Peruvian birds either on rocks or upon the ground, but always associated in large flocks, that lived and built their nests upon trees. He tells us that they are easily discovered from a considerable distance by their loud and most discordant cry. * * * * * The TRUE MANAKINS (_Pipra_) comprise a number of small and most magnificently-tinted birds, distinguished by the shortness of their wings and tails. In the former the primary quills are graduated, very narrow towards the tip, and do not extend beyond the base of the small tail, which is either conical or quite straight at its extremity. The short high beak is compressed at its centre, slightly incised directly behind the hook that terminates the upper mandible, and furnished with a sharp ridge at its culmen. The tarsi are high and thin, and the toes short, the outer and centre toes being united as far as the first joint. The compact thick plumage is extremely short in the region of the forehead, and takes the form of fine bristles around the nostrils and the base of the beak. In the coloration of the male, black predominates, affording a rich contrast to the glowing fiery tints that adorn some parts of his body; whilst the females and young usually appear in a modest garb of greyish green. The Manakins live in pairs, or small parties, and principally frequent the inmost glades of their native woods and forests, hopping from bough to bough with untiring sprightliness, and enlivening the most gloomy recesses of their sylvan haunts by their gay colours and animated twitter. Before noon these pairs or parties unite with other birds in search of food, and at the approach of the mid-day heat again retire to their favourite sheltered nooks. Insects, fruits, and berries of various kinds, constitute their principal food, and to obtain these they occasionally venture near the abode of man. Schomburghk mentions having seen several of these usually very timid birds approach his tent daily, in order to gather the ripe fruit from some fig-trees that grew close to his encampment. The nest of the Manakins is carelessly formed of moss, and lined with cotton wool. The two eggs that constitute a brood are unusually elongated, of a pale tint, and marked with delicate spots that generally form a wreath at the broad end. * * * * *