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Sketch of the hadrosaurid Parasaurolophus in tetrapod or quadrupedal pose, anatomically correct. Made by Tim Bekaert, 2006.
Like other hadrosaurs, Parasaurolophus was facultatively bipedal, i.e. they could alternate between two legs and four, probably preferring a quadrupedal gait while they foraged for food and assuming a bipedal mode for faster running.
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