Ceratopsian Dinosaurs are estimated to be around 60% of the population in the Hell Creek. There are currently two species of Triceratops described T. horridus and T. pororsus along with the sister taxon Torosaurus latus. You can easily make an argument that all of these species are the same and for the purpose of my collection everything is identified as Triceratops sp. so I don't get into an argument with myself and others. Most individuals collect teeth and horns so will start with that but