Now is parasaurolophus. Parasaurolophus had a crest on its head. Scientists think parasaurolophus hooted out of his crest on his head and warned the herd of danger. His crest was 6 feet long. Parasaurolophus was 33 feet long and weighed 7700 pounds. Parasaurolophus walked on four legs and ran on two legs. It had an excellent sense of smell.
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