This animal is slow, phlegmatic, and has none of the agility of the chimpanzee, nor even of the gibbon. Hunger alone seems to prompt his actions, and when appetite is appeased the animal relapses into repose. In sitting, the back is so bent, and the head so depressed, that the orang’s eyes are directed downwards to the earth. Sometimes he holds on with his hands to the higher branches, but generally his arms fall idly by his sides. In such positions the orang will remain for hours in his place, almost motionless, and only occasionally sending forth a note of his deep, gruff voice. By day he is accustomed to go from one tree-top to another, and he only comes down to the ground at night. When anything occurs to scare him, he conceals himself in the underwood. When not hunted, he remains long in one place, and indeed, for several days together on the same tree. He seldom passes the night on a high tree, which he finds too cold and windy, and when night approaches he scrambles down to the lower and more sheltered parts, or to the top of some low, leafy tree, such as the Nibong palm, the pandanus, or the parasitic orchids which are characteristic of the primeval forests of Borneo. He constructs his nest out of small branches and leaves, laid crosswise, and lined with fronds, or with the leaves of orchids, _Pandanus fascicularis_, _Nipa fruticans_, etc. The nests observed by Müller were some of them still quite fresh, placed at a height of from ten to fifteen feet from the ground, and were from two to three feet in diameter. Some of them had a lining of pandanus leaves several inches thick. In others the branches intertwined for a foundation were united in a common centre, forming a uniform surface. The Dyaks say that the orang generally leaves his lair about nine a.m., and repairs to it again about five p.m., or a little later, when it is growing dusk. He sometimes lies on his back, or, by way of change, on his side, drawing his legs up to his body, and supporting his head on his hand. When the night is cold, windy, or rainy, he covers his body, and especially his head, with pandanus or nipa leaves, or with fronds of fern. Although the orang lives in the daytime on the branches of large trees, he seldom crouches on a thick bough, as other apes, and especially the gibbon, are in the habit of doing. He keeps rather to the slender, leafy branches, so that he really reaches the tree-top. He has not the sessor-callosities found on other apes, including the gibbon, and the hips are not so wide and prominent as in those species provided with callosities.