Swordtail, also known as Cocktail, is a genus of herbivorous dinosaur, living in North America in the Late Cretaceous, with a body length of about 2 meters. Its most prominent feature is the hemispherical thickening of the skull, composed of a number of small bones, covering the eyes and back of the neck, male skull thickness of up to 6cm. The genus was named by Lawrence Reibo in 1902. Swordhoratosaurus fossils are mainly distributed in Canada, using two-legged walking. There is controversy in the academic community about its thickening craniocerical function, which may be used for intrassic collisions or to ward off predators. Early studies have classified it as a close relative of the wounded tooth dragon. After the discovery of the skull in 1945, it was confirmed to belong to the thick head dragon.

Also known as the top horned dinosaur, it is a herbivorous dinosaur belonging to the suborder of thick headed dinosaurs in the order Ornithischia, and lived in North America during the Late Cretaceous period. Length of 2 meters. Originating from the swollen headed dinosaur family, it is a bipedal herbivorous dinosaur. The thick and round skull is the most prominent feature of stegosaurs. Due to the femur being slightly longer than the tibia, the running speed of Stegosaurus may not be fast. Like other dinosaurs in the Pachycephalosaurus family, Stegosaurus had a thick skull composed of many small bone fragments that covered its eyes and neck like a semicircle. At birth, the head is not very thick, and as age increases, the skull will become thicker.

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.