Dewback

Dewbacks are the extinct giant 24 ft long omnivorous cold-blooded reptiles related to modern day tuatara. it once ate small animals, camels, bisons, varactyls, horses, dead animals, and plants found in north american floodplains. dispite being cold-blooded like most modern day reptiles, they are as smart as the modern day eagle, meaning they could outsmart the extinct north american camels, bisons, varactyls, and horses, which they preyed on. it died out in the year 1482 due to people overhunting its prey, climate changes, and habitat destruction combined. now only few of north american animals that dewbacks preyed on survived, which are bisons and varactyls. dispite horses in north america today, they're not the surviving group of american horses of the past that the dewback preyed on. (this is mearly a fictitious creature, witch originates from, the popular movie franchise, starwars.)