The TREE-CLIMBERS (_Anabata_) constitute a family of South American birds, with slender bodies, short wings, and long tails. Their straight or but slightly curved beak is strong, and of the same length as the head. The tarsi are of medium height; the toes small, armed with short and slightly-curved claws. The fourth quill of the wings is the longest. The very decidedly graduated tail is composed of twelve short feathers. All the members of this family inhabit forest or woodland districts, and but rarely venture forth into the open country. Insects form almost exclusively their means of subsistence; and in search of these they climb the branches with an agility fully equalling that of the Titmouse. Many species are remarkable for the peculiarity and loudness of their cry. Their nests, which are usually suspended from the trees, and closed above, are frequently very striking in appearance.
[Illustration: THE HOOPOE (_Upupa epops_).]
The BUNDLE-NESTS (_Phacellodomus_) are recognisable by their short, almost straight beak, which is much compressed, and very slightly hooked towards its tip. The tarsi are high and strong; the wings rounded; and the broad tail formed of narrow, soft feathers.
THE RED-FRONTED BUNDLE-NEST, OR CLIMBING THRUSH.
The RED-FRONTED BUNDLE-NEST, or CLIMBING THRUSH (_Phacellodomus rufifrons_), is of a light brownish greenish grey on the upper parts of the body, and light brownish white on the under side. The quills are greyish brown, with a reddish gloss on the outer web; the brow is deep rust-red, and a stripe over the eyes pure white. The eye is grey, the upper mandible dark greyish brown, and the lower one whitish grey. The foot is pale blueish grey. This species measures six inches and a quarter, the wing two inches and a quarter, and the tail two inches and a half.
[Illustration: THE RED OVEN BIRD (_Furnarius rufus_).]
The Prince von Wied tells us he only met with these elegant little birds upon the arid interior highland tracts of Geroes and Bahia, where they inhabited the open country, and passed their time in hopping or flying from one bush or tree to another. As regards its nidification, the Prince von Wied remarks, "I found the nests of the _Phacellodomus rufifrons_ about February; they were usually suspended on the low, slender branches of high trees. Those I saw are best described as large oval bundles, often more than three feet long, and formed of thin twigs heaped together and interwoven with each other, or fastened together by a variety of materials. The interior was filled with small bundles of moss, hair, wool, or fibres interlaced, so as to form a warm and compact lining. The small round hole that serves as an entrance is situated at the bottom of this suspended mass, so that the birds ascend from below into their huge domicile. Year by year these nests are added to and enlarged until at last it is not uncommon to find that they have so increased in size as to render it a difficult task for a man to stir one of them. On opening a nest of this description a row of chambers is seen, under the one last made." These ancient apartments are, we believe, frequently employed as retiring-rooms for the male parent. Swainson tells us that these strange and shapeless masses are very conspicuous features in the landscape. The brood usually consists of four eggs, which are round in shape, and generally of a pure white.