Ent Bellows a Challenge

There is, in Lord of the Rings, mention of beings known as the Ent; creature that were also called 'Tree Herders'. When one named Tree Beard discovered the devastation of a large forest, he was outraged. His bellow was heard by his kind far across the land, others of his kind bellowed the challenge as well allowing the call to war to reach even greater distances, until it had reached the Ent in every corner of the land. It mattered not where the Ent were; hearing the call, they came to do battle.