Conceptual illustration of Dromaeosaurus, a genus of feathered theropod dinosaur which lived during the Late Cretaceous period, sometime between 80 and 72.8 million years ago, in Alberta, Canada, and the western United States. Dromaeosaurus had a relatively robust skull with a deep snout. Its mouth was full of sharp teeth, and it had a sharply curved sickle claw on each foot. Because of its assumed close relationship to modern-day birds, Dromaeosaurus may have been a social dinosaur. Hunting in packs would have allowed it to attack much much larger prey, however pack hunting behaviour in Dromaeosaurus is a debated topic.