Unisaurs are the innumerable supporting characters on Dinosaurs. Rather like the Anything Muppets and Whatnots, the Unisaurs are recycled, with variations in costume and occasional cosmetic alteration, for the many guest characters, background extras, and minor recurring characters. These characters can be divided between full body puppets, of which there were only five or six, and hand puppets, of which there were a dozen or more. Unisaurs were created and used to ease the production staffs need to populate a world of dinosaurs week after week. Changing costumes and occasionally features on an exisiting dinosaur was a lot faster (and cheaper) than creating individual and unique dinosaurs for every individual role. Without the Unisaur, Dinosaurs would not have been able to keep the world p