Edmontosaurus

About 12 to 15 metres (39 to 49 feet) long and weighed around 5.6 to 15.9 metric tons (6.2 to 17.5 short tons).3

It ate tough plants like pine needles, cones, twigs, and evergreen trees. It used its duck-like beak to crop food and hundreds of teeth to grind it up.41

It lived during the Late Cretaceous period, from about 76 to 66 million years ago.4

No, mummified specimens show preserved skin with a bumpy texture, but no feathers have been found.4

Computer models suggest it could reach speeds up to 57 km/h (35 mph) as a subadult.1

It lived in wetlands and coastal plains, so it likely could swim, but no source gives a clear answer.1

Its broad, duck-like beak helped it cut loose food like twigs and leaves. It was a herbivore.34

Fossils have been found across western North America, from Colorado to Alaska, especially in Canada and the United States.31

Yes, it lived in herds of tens to hundreds of individuals, as shown by many bonebeds with thousands of bones.1