The lightly built sprintosaurs are not the only grazing animals that roam across the vast prairies of North America. Huge slowly-moving grass-eaters also exist here, cropping the grasses down to their roots and moving on in black dusty herds. The huge monocorn is one of several species of ceratopsian that still inhabit the North American continent. It differs in appearance from the members of its ancestral stock, such as Triceratops and Styracosaurus, but the differences are not really profound, and they are a reflection of the life that the animal now leads. 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. T
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