Gallimimus, the "Chicken Mimic,"  looks very much like an ostrich and moves like one too. At over two meters tall and six meters long, this interesting dinosaur was not  much taller than a human but was  much longer and faster. Its long  limbs and strong, hollow bones  assisted in very fast running,  which helped it get from place to  place and escape predators if need  be. Its long, stiff tail served as a  counterbalance while running. Unlike other members of its family Ornitho- mimidae, it had short hands and an elongated skull due to its long  snout. However, like other ornitho- mimids, Gallimimus was covered with a handsome coat of feathers,  complete with wing-like arms.  Gallimimus fossils are found in  Mongolia's Nemegt Formation, a geo- logical formation from the late Cretaceous Period. The environment of this formation was originally humid floodplains, rivers, and  lakes. It featured a wide variety of animal life and a rich amount of  plant life, which was plenty of food  to support omnivorous Gallimimus.  Gallimimus' diet likely consisted of  mostly high-fiber vegetation, but  may have occassionally included small animals that it could swallow  whole. Although it may have eaten meat, it certainly was not the top of the food chain; its long legs  would have come in handy escaping  from the local tyrannosaurids.