They are thought to have hunted in packs or social groups. They walked on two legs. Troodontids had relatively large brains. Their large eyes possibly were better adapted for hunting during twilight or at high latitudes. Dromaeosaurids were possibly the fastest, fiercest predators of any knid.
Recent studies indictate adaption for heat dissipation or loss.
This discovery includes the most bones from a single dinosaur yet found, but the skull is missing. It is the oldest hadrosaur known in Alaska. The Ultimate Dinosaur Book. Alaska's Dinosaurs and Other Prehistoric Critters. PAWS IV Publishing.