Rhyandontus

Rhyandontus (name meaning "true teeth") is an extinct species of theropod dinosaur belonging to an extinct family of theropod dinosaurs, Dromaeosaurids. It was one of the first ever species of Dromaeosaurid confirmed to be a flying animal, unlike most other Dromaeosaurids, with the exception of Rahonavis, which could also fly in a similar fashion. It was about the size of a feral pigeon or a raven, depending on a species. It lived in the Late Jurassic (about 160-145 million years ago) in what is now North America, where it filled a similar niche to today's African oxpeckers and had fed on insects, early ticks, and early mites. It probably hitched a ride on large dinosaurs like Stegosaurus, Diplodocus, Apatosaurus, Brontosaurus, Brachiosaurus, Camptosaurus, and other herbivores in a similar fashion to oxpeckers of today's Africa, according to fossil evidence. No one knows why this little raptor became extinct at the end of the Jurassic.