At first glance, many confuse Allosaurs with juvenile Tyrannosaurs – when a tooth filled maw is racing toward you, the finer points of dinosaur anatomy are largely unimportant. While there are carnivorous theropods of similar build, adult Allosaurs are smaller, about half the size of Tyrannosaurs, and have horns, fins and bony ridges decorating their skulls. They also have extremely dexterous grasping forearms, enabling them to grab hold of prey and finish them off with their serrated teeth. They are usually found with intricate camouflage patterns in colours of greens, browns and dark reds.

Allosaurs are typically solitary hunters and scavengers, though they have been known to congregate in family packs to raise their young. Lone males are notoriously single – minded and will pursue prey to the exclusion of all else.