When an animal is given a task to complete, it is almost always more successful after observing another animal doing the same task before them. Experiments with several different species have shown the same effect: animals can learn behaviors from peers. However, there is a need to make a difference between the propagation of behavior and the stability of behavior. An animal might show the behaviour just once. In this case, the behaviour is not stable. Research has shown that social learning can spread a behavior, but there are more factors regarding how a behaviour is spread from one generaton of animals to the next, in an animal culture.