Reading: Animals group have two kinds: closed (don't accept others) and permeable (welcoming the others). Permeable group is better because new members bring new knowledge.
Listening: chimpanzee is a good example, they leave home since they grow up, join into a new group. And all are friendly easy to live. Bring new knowledge, different chimpanzee live in different place before. One chimpanzee perhaps use sticks to get eggs from nest. Others watching him while he is doing this, and they learn that too.