The herds of monocorn need to be on the move constantly, for once all the grass in one area is eaten up they have to move on to fresh areas. The legs are therefore longer and more slender then we would expect in such a large animal. The feet are digitigrade, that is they support the weight of the body on the toes rather than on the flat of the foot – the plantigrade condition of the monocorn’s ancestors. In common with the ancient ceratopsians the neck and shoulders are protected by a bony frill, and a horn on the nose is used as a weapon.
The ceratopsians are now no longer confined to the Nearctic continent. Several species are now found in the Palaearctic realm where they spread via the land bridge between the Nearctic and Palaearctic continents before the Ice Age.
The bony frill of the monocorn is very long, covering the length of the neck to the high shoulders. It is used when males spar with one another for herd leadership. The contestants push harmlessly against one another until one tires and gives way. The horn of the monocorn is a formidable weapon when turned on an attacking carnivore like a northclaw. Monocorn herds usually travel with big males on the outside protecting the females and hornless young.