One way to learn new skills is by observing the behavior of other people or animals. This is called Observational learning. It is a form of social learning which can take different forms. In humans, this form of learning seems to not need reinforcement; instead a social model such as a parent, sibling, friend, or teacher with surroundings is needed. For a child, a model is someone of authority or higher status in an environment. In animals, observational learning is often based on classical conditioning. In classical conditioning instinctive behavior is provoked by observing the behavior of another (e.g. mobbing in birds), but other processes may be involved as well.