Orange-Utan
Aiton's Encyclopedia (1910)
a manlike ape found in the forests of Borneo and Sumatra. The male attains a height of possibly four feet, and stands erect in a constrained position with its long arms almost touching the ground. The name is Malay, signifying man of the jungle. The orang walks on all fours, with a gait resembling that of a person hobbling forward on crutches. It is too heavy to jump from branch to branch, but it swings itself in tree tops with grace and great agility. The feet, hands, and face are bare. The rest of the body is covered with scanty reddish hair. The orang-utan feeds chiefly on fruits and the succulent shoots of trees. It descends to the ground for water. It builds large nests in tree tops, and is quite inoffensive, though defending itself with ferocity when brought to bay. The orang is about two-thirds as large as its African relative, the gorilla. It has brick red hair. The gorilla is black. Mr. William T. Hornaday writes: In captivity young orang-utans are as affectionate as human children, and very fond of their human friends. In the jungles of Borneo the full-grown males often flight savagely by biting each other's faces, and by biting off fingers and toes. At night the orang makes a nest to sleep upon by breaking off leafy branches and laying them cross-wise in the forked top of a sapling. On this huge nest-like bed it lies flat upon its back, grasps a branch firmly in each hand and foot, and is rocked to sleep by the cradle-like swaying of the tree top. Unless attacked at close quarters in their forest homes, none of the great apes is dangerous to man. All of them flee quickly from the dreaded presence of Man, the Destroyer. They never fight with clubs, but when attacked at close quarters they bite, just as do human roughs. When enraged, the gorilla does beat its breast with its fists, just as Du Chaillu said; and it does this even in captivity. Place upon the shoulders of a gorilla the head of a chimpanzee, and we would have--what? The Missing Link, no less--a hairy, speechless man! The man-apes we have. Let those who seek the undiscovered ape-man search the Tertiary deposits of the fertile uplands that lie between the gloomy equatorial forests of the black apes and the Bushmen of South Africa; for there, if anywhere, will the Missing Link be found.
What Has Changed in the Last Century
Aiton's 1910 entry treats the orang-utan as a single animal of "Borneo and Sumatra"; zoologists now recognise three species, the Bornean and Sumatran orangutans (separated as distinct species in the 1990s) and the Tapanuli orangutan, described only in 2017 from a population of fewer than 800 animals in northern Sumatra. All three are classed as Critically Endangered, chiefly through logging and oil-palm clearance, a threat the 1910 account does not mention at all. Hornaday's closing invitation to hunt the "Missing Link" in African Tertiary deposits was, in its geography, not far off — the Taung child was found in South Africa in 1924 and "Lucy" in Ethiopia in 1974 — but the idea of a single link has been discarded, and DNA now places the orangutan as the most distant of the great apes from us, with chimpanzees and bonobos our nearest kin. Field study since the 1970s has also overturned "quite inoffensive": orangutans make and use tools, and the big flanged males are now known for long-call territorial display rather than the face-biting brawls Hornaday described.
Written for this edition, 2026.