Which monkey flips its lip?

Chimps are known for having strong communication and acrobatic skills. These apes swing from trees with their long arms and legs. They also look like they are trying to talk to humans. Chimps live in communities where they have a hierarchy. One chimpanzee is the leader and it dominates the others who are in a lower rank. In the community, it would be either all males or all females in them.

Chimps are known for being very smart. They can learn parts of the human language due to practice by so many scientists. Sometimes, the chimps will flip their lips up. The chimps are trying to communicate to others. Chimps can also be violent because they want their territory. Some chimps kill other chimps for the territory.