The ankylosaurus is the largest of the heavily armored dinosaurs called ankylosaurids, but smaller versions exist as well. Still Large in size, these smaller dinosaurs, such as the 16-foot long pinacosaurus, lack the trample ability and are rarely above 4th level. Regardless of size, ankylosaurids tend to be relatively muted in coloration, with mixes of black, brown, and gray. When captive, an ankylosaurus's keeper might paint its scales bright colors to signify to others that is not a wild creature.