Evidence of Swimming Dinosaur Found

Researchers have found tracks of a previously unknown, two-legged swimming dinosaur with birdlike characteristics in northern Wyoming and are looking for bones and other remains in order further identify and name it.

It was about the size of an ostrich, and it was a meat-eater," said Debra Mickelson, a University of Colorado graduate student in geological sciences. "The tracks suggest it waded along the shoreline and swam offshore, perhaps to feed on fish or carrion."

The tracks indicate a dinosaur that was about 6 feet tall and lived about 165 million years ago along an ancient inland sea, Mickelson said in a university news release.

"The swimming dinosaur had four limbs and it walked on its hind legs, which each had three toes," she said. "The tracks show how it became more buoyant as it waded into deeper water — the full footprints gradually become half-footprints and then only claw marks."

Mickelson said research so far by herself and others supports the "conclusion that the dinosaurs were intentionally swimming out to sea, perhaps to feed."

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