DIPLODOCUS
Deplodocus was a huge dinosaur that grew as long as 100 feet. But its incredibly long neck and even longer tail took up most of this length. In fact his body accounted for only about 13 feet of its entire length, while its tiny head measured a relatively small two feet.
Deplodocus lived during the Late Jurassic Period and probably traveled in herds around what is now Colorado, Montana and Wyoming, feeding on the lush vegetation that thrived at the time. Deplodocus was much lighter than other large plant-eating Sauropods because its bones were hollow.
Some scientists believe that when Deplodocus was hungry it could stand up on its rear legs and stretch to nearly 50 feet above the ground in order to feed on the very tops of trees.