Wolves
There’s a reason why Hollywood makes movies and shows about werewolves—creatures that can shape-shift from humans to wolves when the moon is full. Although werewolves are a myth as far as we know, actual wolves will attack when they’re afraid, provoked or very hungry. In some instances, they’ll even attack if they’re infected with rabies. Wolves don’t discriminate against their victims. They’ll go after humans and other animals both big and small until their hunger is satiated.