Behaviour typically

Agonistic behaviour typically consists of squabbles between individuals climbing over or passing each other. This occasionally involves biting. Males t

hat are strangers may wrestle, chase, and bite each other.[81] In extreme situations, a male may try to displace a smaller rival from a tree. This involves the larger aggressor climbing up and attempting to corner the victim, which tries either to rush past him and cli

mb down or to move to the end of a branch. The aggressor attacks by grasping the target by the shoulders and repeatedly biting him. Once the weaker individual is driven away, the victor bellows and marks the tree.[82] Pregnant and lactating females are particularly aggre

ssive and attack individuals that come too close.[81] In general, however, koalas tend to avoid energy-wasting aggressive behaviour.[71]