Fossil of the upper half skull of the swollen dragon

The swollen headed dragon is a member of the thick headed dragon family in the order Ornithischia of the class Sauropods. The swollen headed dragon, also known as the thick headed 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. The area around the head and nose tip are also covered with small bone tumors, and some have large and sharp spines behind the head. Living in the late Cretaceous period, mainly distributed in North America, inhabiting plains, deserts, and other environments. Sexually inclined to live in groups, males fight in the form of "heads", with the winner being the leader of the entire group and occupying the female dinosaur. A herbivorous dinosaur that feeds on fruits, leaves, and other food.