Fossil skull of swollen headed dragon

The swollen headed dragon is a member of the thick headed dinosaur family in the bird hipped order of the lizard class. The swollen head dragon, also known as the thick head dragon, has a thick bone plate on its head, which can reach a thickness of over 20 centimeters and is raised high, like a tumor. The body length is 4-6 meters, and the weight is 0.5-4 tons. There are also small bone tumors around the head and nose tip, and some have large and sharp spines behind the head. Living in the late Cretaceous period, mainly distributed in North America, inhabiting environments such as plains and deserts. Sexual preference is social, with males fighting in the form of "heads", and the winner being the leader of the entire group, occupying the female dinosaur. Herbivorous dinosaurs feed on fruits, leaves, and other food.