pachycephalosaurus silhouette dinosaur jurassic prehistoric anim

america ancient animal antiquity archeology background beast biped black dino dinosaur era extinct extinction fossil graphic herbivore history icon illustration image isolated jurassic label large lizard logo model monster nature north object old pachycephalosaurid pachycephalosaurus paleo paleobiology paleontology power powerful prehistoric prey primeval reptile restoration science sign silhouette symbol vector wild wildlife zoo zoology