The animal on the cover of Managing Projects with GNU Make, Third Edition is a potto, a member of the loris family. A small primate native to the tropical forests of West Africa, the potto is 17 inches long and covered with dense, wooly, reddish-brown fur. Its opposable thumbs give it an excellent grasp, leaving it well adapted to its life in the trees. The potto spends its days sleeping in crevices or holes in trees, emerging at night to hunt for food (insects, snails, and bats). Unlike many primates, the potto generally lives alone.