orangutan vs. chimpanzee

either of two species of long-armed, arboreal great ape, the only extant members of the subfamily Ponginae, inhabiting Borneo ( Pongo pygmaeus ) and Sumatra ( P. abelii ): both species, including all three of the Bornean subspecies, are endangered.

a very social great ape of sub-Saharan Africa, belonging to the genus Pan and having a brown-to-black coat, a relatively hairless face with a rounded muzzle, prominent ears, and hands adapted for knuckle-walking, and noted for its intelligence and humanlike behavior: both species, the common chimpanzee ( P. troglodytes ) and the bonobo ( P. paniscus ), are greatly reduced in number and considered endangered.