The OVEN BIRDS (_Furnarius_) possess a moderately strong beak, either quite straight or slightly curved, compressed at its sides, and almost equalling the head in length; the blunt wing is of medium size, its third quill is the longest, while its first is considerably, and its second slightly shortened; the short tail is composed of soft feathers; the tarsus is high, and the toes strong; the claws are somewhat hooked, but only the first is of any considerable size. These birds frequent both open woodlands and inhabited districts; they live for the most part on the ground, as their powers of flight and climbing are very limited. Their voice is loud, harsh, and peculiar. The strange nests built by the members of this group, and from which their name is derived, have been described by Azara, the Prince von Wied, Burmeister, Darwin, and other writers. "After passing over the lofty chain of mountains that separate the well-wooded coasts of Brazil from the Campos, travellers are astonished at beholding large, melon-shaped masses of clay standing erect upon the branches of the high trees surrounding the settlers' houses. Were it not for the regularity of their size and shape, a stranger would at once pronounce these masses of clay to be nests built by the termite ants. On closer inspection of one of these the eye detects an oval-shaped hole at the side, and a little patience is rewarded by a sight of the actual inhabitant of this most remarkable nest as he slips in and out of the entrance to his strange abode. This bird, known to us as the _Furnarius rufus_, is called the João de Barro, or Clay Jack, by the Brazilians." We learn from Darwin that these nests are also placed in such exposed situations as the top of a post, a bare rock, or on a cactus, and are composed of mud and bits of straw. The strong, thick walls in shape precisely resemble an oven, or a depressed bee-hive. The opening is large, and directly in front; within the nest there is a partition, which reaches nearly to the roof, thus forming a passage or antechamber to the true nest. THE RED OVEN BIRD. The RED OVEN BIRD (_Furnarius rufus_) is about seven inches long and ten and a half broad; the wing measures three inches and three-quarters, and the tail three inches. The plumage is principally of a reddish yellow; the top of the head brownish red, and the quills brown; the under side is of a lighter tint, and the throat pale white; a bright reddish yellow stripe passes from the eyes to the back of the head; the quills are grey, the primaries edged with pale yellow towards their base, and the tail-feathers yellowish red; the eyes are yellowish brown, the beak brown, except at the whitish base of the lower mandible; the foot is also brown.