What Are Wrens Doing?

Hierarchical organization is the rule among animals that live somewhat socially. Wolf packs organize themselves into hierarchies, chimpans s organize itself into hierarchies and there are rat hierarchies. There has to be some way of organizing access to relatively scarce resources that doesn't result in chronic combat. The wrens ounce their prowess with the quality of their song and their displays,. And they indicate to one another who shouldn't be messed with.