English: Edmontosaurus is a large hadrosaurid dinosaur from the Late Creteceous. Due to similarities with other hadrosaurs, it went through several renames and classifications until it was finally named after the city of Edmonton, for fossils discovered in southern Alberta, Canada. Edmontosaurus was among the largest hadrosaurids, with larger specimens reaching up to 12 m in length, with an estimated mass of around 4 t. It was a bulky animal with a long, laterally flattened tail and a head with an expanded, duck-like beak. The fore legs were not as heavily built as the hind legs, but were long enough to be used in standing or movement.