We'll start with lower ones, and then work up to our closest relatives, the chimpanzee and bonobo.
A 1996 case was even traced to hunters who skinned and chopped a chimpanzee found dead in the forest.
No African fossil has ever been found that is related to chimpanzees or gorillas.
The argument is at its most powerful when it comes to the great apes chimpanzees , gorillas and orang-utans.
The apes nest on the ground like gorillas but have a diet and features characteristic of chimpanzees .
Protected species such as elephants, gorillas and chimpanzees are prized, but illegal, pieces of meat.
The net effect is that hunting bonobos, chimpanzees , and gorillas has now become big business.
His favorite species for this work are chimpanzees , bonobos, and capuchin monkeys.
Gorillas practice infanticide and chimpanzees hunt and torture baboons.
Could some birds really be as intelligent as primates such as chimpanzees or bonobos?