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Edmontosaurus is a flat-headed duck-billed dinosaur. Once threatened by the T. rex, it loves hanging out in herds and munching on conifers.  Edmontosaurus is a genus ofhadrosaurid (duck-billed) dinosaur. It contains two known species:Edmontosaurus regalis and Edmontosaurus annectensFossils of E. regalishave been found in rocks of western North America that date from the lateCampanian stage of the Cretaceous Period 73 million years ago, while those ofE. annectens were found in the same geographic region but in rocks dated to the end of the Maastrichtian stage of the Cretaceous, 66 million years ago.Edmontosaurus was one of the last non-avian dinosaurs, and lived alongside dinosaurs like Triceratops and Tyrannosaurus shortly before the Cretaceous–Paleogene extinction event.

Edmontosaurus included some of the largest hadrosaurid species, measuring up to 12 metres (39 ft) long and weighing around 4.0 metric tons (4.4 short tons). Several well-preserved specimens are known that include not only bones, but in some cases extensive skin impressions and possible gut contents. It is classified as a genus of saurolophine (or hadrosaurine) hadrosaurid, a member of the group of hadrosaurids which lacked large, hollow crests, instead having smaller solid crests or fleshy combs.[1

Edmontosaurus

edmontosaurus

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