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Parasaurolophus is most easily recognized by the curved six-foot crest on its head. The function of the crest is not completely understood, nor do scientist know for sure whether Parasaurolophus walked on two legs or four. Parasaurolophus had a number of features similar to present day birds including a duck-bill, bird-like hips and were ‘ornithopods’ which means ‘bird foot.’

• Late Cretaceous, 76-74 million years ago
• North America
• Herbivorous, Herd
• 17 feet tall, 36 feet long, 7,800 lbs