Terror Raptors are descended from troodons that survived extinction and filled the similar niche to the extinct terror birds, which mostly lived in South America. They are one of the top predators of today's North American grasslands and forests, even competing its prey (deer, bison, etc.) over cougars and wolves (wolves and cougars still thrive despite this, much like how many South American mammal megafauna of the Pliocene-Pleistocene still thrived even when terror birds still existed), but stays away from grizzly bears as the grizzly bears are very powerful predators. Terror raptors can prey on small reptiles, small mammals, deer, bison, pronghorns, and also feeds on carrion. They have evolved a beak (much like what happened to the ancestors of ornithomimid-grouped dinosaurs of the Meso