Kullinosaura

Kullinosaura was a genus of small-to-medium-sized Alvarezsaurid theropod dinosaur from late Cretaceous and early Paleocene Montana and South Dakota, from around 68-60 million years ago, making it the last known Alvarezsaurid in fossil record. With long, skinny leg, it moved about on two legs, was likely very nimble and could run at high speeds, something that would have been useful in the open flood plains and dunes where it lived. It had a small skull, and its teeth were small and pointed, suggesting that it ate insects and small animals, such as lizards and mammals. Its large eyes might have allowed Kullinosaura to hunt by night, when it was cooler and there would have been fewer predators about. During the Late Cretaceous, it was around the size of Mononykus, but due to the K-T mass extinction and in early Paleocene, it was smaller, about the size of Shuvuuia.