The animal on the cover of UML 2.0 in a Nutshell is a chimpanzee (Pan troglodytes).
Chimpanzees use a vast array of facial expressions,postures,and gestures
to communicate with each other, in addition to at least 32 different sounds. There is some evidence to suggest that chimpanzees can learn symbolic languages.
The natural habitat of the chimpanzee is western Africa, from Sierra Leone to the
Great Lakes east of the Congo. Living primarily in forested areas, chimpanzees
spend 50 to 70 percent of their time in trees. They are omnivores, eating primarily fruits and vegetables, but they will also hunt and eat small animals. They live in family groups that consist of about twice as many females as males. While adult chimpanzees aren't monogamous, there's a close bond between a young chimp and its parents, and this bond remains unbroken for life. Chimpanzees are very sociable and affectionate animals,and frequently hug,kiss,stroke each other,or
hold hands.Violent fights often break out within a social group. The loser of the
fight makes up to the winner by displaying submissive behavior and conciliatory gestures. In this way they maintain the social harmony.
Though able to,the chimpanzee rarely walks erect on both feet.Short arm
muscles prevent simultaneous extension of the wrists and fingers.Because of this,
chimpanzees can't walk with their hands flat; when walking on all fours,only the
knuckles of their hands touch the ground. Unlike human feet, chimpanzee feet
also have an opposing toe, but it's used mainly for climbing and for walking on
precarious footing. The foot is rarely used for picking up objects.