Long ago Chimpanzee was divided into two by gene analysis. It is unique act. For example, hit stone and dig stick. Habitat is lost by a lot of capture animal test. Breeding Chimpanzee continue to trial return wild Chimpanzee in Gambia.
Most Chimpanzee habitats are divided.
The Chimpanzees are on the verge of extinction. Chimpanzees that live in Sudan or Burundi are especially on the verge of extinction. Chimpanzee that lives in Tanzania is killing each group fellows. Besides they also kill their baby. These things are internal causes.