Ah, yes. The mighty duck-billed dinosaur: Edmontosaurus. Enormous in length, gargantuan in height, however, they are not the brightest animals.
— Allen, about Edmontosaurus

Edmontosaurus (name meaning "Edmonton's Lizard"), also previously called Anatotitan (name meaning "Giant Duck"), is a genus of hadrosaurid dinosaur that originated during the Late Cretaceous period in what is now North America. Measuring around 13 meters long and weighing more than 4 tons, Edmontosaurus was among the largest species of hadrosaur.

In the Series 2 finale "Fall of a Kingdom Part II: The Return of the King", a small herd of eight Edmontosaurus was brought back to the park from Montana of 65 million years ago. They reside in the Hadrosaur Springs enclosure of the park. They have also recently had hatchlings in the enclosure.


Era & DiscoveryEdit

Edmontosaurus lived in western North America during the Late Cretaceous period from 76–65 million years ago. It was among the largest herbivores of its time and was also among the last member of the hadrosaur family of dinosaurs. Edmontosaurus was also one of the last non-avian dinosaurs on Earth before the mass extinction event. 

The first fossils named Edmontosaurus were discovered in southern Alberta in 1892 and named after Edmonton, the capital city, in the Horseshoe Canyon Formation (formerly called the lower Edmonton Formation).

Physical AttributesEdit

Edmontosaurus was a very large hadrosaurian dinosaur, arguably the largest member of the hadrosaur family. They measured over 37–43 feet (11–13 m) long, stood 13 feet (4 m) tall at the hips, and weighed 4–6 tons (8,000–12,000 lbs.), the size of a railroad boxcar. Like the Iguanodon dinosaurs before it, Edmontosaurus could run up to speeds of 50kph. Despite its relatively large size, Edmontosaurus was preyed upon by predators, including the North American apex predator, Tyrannosaurus rex, as it viewed Edmontosaurus as a favorite prey item.  

It also had very large and wide hind legs and its front legs were short and chunky. Edmontosaurus was mainly yellow with brown stripes and a brown-colored bill. Its underbelly and feet were white. Like the other members of the group, Edmontosaurus had a large bill that resembled that of a modern duck - hence its original name. Within the bill was a large battery of teeth. These teeth were perfect for stripping vegetation and then chewing it rather than the more primitive method of swallowing it and lets its digestive system do all the work.

Behavior & TraitsEdit

Like all herbivores, Edmontosaurus lived and roamed in small groups to large herds, consisting of up to thousands of members. However, most males, when they reached maturity, separated from the heard and went off on their own to form their own herds. Each year, Edmontosaurus would have massive migrations following the rains from north to south and back, traveling 600 miles in the process. When feeding, huge batteries of chewing teeth made short work of the vegetation they ate. When chewing, Edmontosaurus's jaws moved from side to side.

Edmontosaurus was relatively defenseless against any large carnivores, such as Tyrannosaurus. However, although it had very few weapons of choice, Edmontosaurus did possess the ability to run rather quickly for creatures as large as they were. Like its ancestors, the earlier Iguanodon dinosaurs, Edmontosaurus walked on all four legs but it could run on its hind legs. However, its speed never always guaranteed its safety. Additionally, Edmontosaurus possessed a massive tail that measured a staggering 23 feet (7 m) long. Edmontosaurus was able to use its tail like the arm of a crane, swinging it against smaller attackers like Dromaeosaurus.

Journal Entry Edit

A large duck-billed dinosaur that once inhabited the western regions of North America, Edmontosaurus ("Edmonton's Lizard") is among the largest hadrosaur dinosaurs. Measuring over 40 feet long and weighing over 4000 kilograms, these giants were large enough to shrug off most attacks, however still vulnerable to apex predators. When cornered, an Edmontosaurus can rear back on its hind legs, bringing down its immense weight in a stomp with enough power to kill small predators.

Edmontosaurus may look like a sprinter, but those massive thigh muscles allow it to gallop at high speed. This takes a lot of energy though, meaning they can’t run for long. Although it would have been a tight squeeze, Edmontosaurus found its food among the broadleaf forests. Its name is derived from the location where it was first found - Edmonton, in southern Alberta, Canada.

— Allen, in his journal, about Edmontosaurus



  • Edmontosaurus was the largest hadrosaur, as well as ornithopod, brought to the park.
  • The sound effects of Edmontosaurus are that of camel, duck, elephant, geese, moose, hippo, and horse sound effects. It also produces sounds featured in "Jurassic Fight Club" and the "Walking with Dinosaurs" movie.
Community content is available under CC-BY-SA unless otherwise noted.