Several members have been observed indulging in play behaviour fighting over perches.

Many species adopt play behaviors that are practice for both mating and for rearing young.

Other toys should not be given to children because they encourage undesirable play behaviors.

This is in contrast to young foxes and coyotes, which may begin fighting even before the onset of play behavior.

Some were also prompted to engage in play behavior with the objects.

Porbeagles are among the few fishes that exhibit apparent play behavior.

These duties include carrying, protecting, feeding, comforting, and even engaging in play behavior with the group's young.

Some toys can serve multiple functions for dogs to interact with, combining common play behaviors into a single toy.

During this period, the juveniles sing the female form of call, and regularly engage in play behaviour.

Thus, background television disrupts very young children's play behavior even when they pay little overt attention to it.