Wolves hunt together. By doing so each can more easily track and take down large game. Although the individual has to share meat, each still benefits from group hunting. Group hunting is less important in primates. Chimps hunt some but meat is not a major part of their diets.
Group hunting is important in many human societies, however.
Sleeping together to conserve warmth . This explains why individuals form groups at night but it does not explain why groups are maintained during the day. Shared information . For example, frugivores let each other know where fruit trees are located. Protection from predators .