Pachycephalosaurus is a dinosaur belonging to the order Ornithischia and the family Pachycephalosauridae within the class Reptilia. Pachycephalosaurus, also known as the thick-headed dinosaur, sports a skull adorned with thick bony plates that can exceed 20 centimeters in thickness and rise high in a prominent dome, resembling a tumor—hence its scientific name, which literally means “lizard with a thick head.” Pachycephalosaurus measured 4 to 6 meters in length and weighed between 0.5 and 4 tons. Its head was adorned with numerous bony knobs, and some individuals even bore large, sharp spikes at the rear of the skull.

The swollen-headed dinosaur is a thick-headed dinosaur in the order ornithidae, a sauroid. The swollen head dragon is also called the thick head dragon. The head has a thick bone plate with a thickness of more than 20cm and a high elevation, just like a tumor. The original meaning of the scientific name "lizard with thick head" originates from this. The swollen-headed dragon has a body length of 4-6 meters and a weight of 0.5-4 tons. The head and tip of the nose are also covered with small bone tumors. Some have large and sharp spines behind the head.

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.

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.

Stegoceras (genus name: Stegoceras), also known as the top horned dinosaur, is a herbivorous dinosaur belonging to the suborder Ornithischia, and lived in North America during the Late Cretaceous period. Sword horned dragon is 2 meters long. Sword horned dragon was named by Lawrence Lambe in 1902, and its scientific name means "horned head" in Greek. Sword horned dinosaur comes from the swollen headed dinosaur family and is a bipedal herbivorous dinosaur. They lived in the late Cretaceous period and had a body length of about 2 meters. The thick and round skull is the most prominent feature of stegosaurs.