Werewolves

The werewolf is a being that transforms into a wolf on the full moon. The transformation is painful and the human characteristics, such as reason and control, the being had before transformation are lost once the wolf form takes over. The transformation generally lasts through the night and the being will return to its human form on daybreak. In story they are called shifters, short for shape-shifters. They can transform fully or just claws and fang, have sharp senses and remarkable powers of recovery, healing broken backs in a few hours.