Orodromeus (Greek for "mountain runner"); pronounced ORE-oh-DROME-ee-us
Woodlands of North America
Late Cretaceous (75 million years ago)
Size and Weight:
About 8 feet long and 50 pounds
Small size; bipedal posture
One of the smallest ornithopods of the late Cretaceous period, Orodromeus was the subject of an understandable goof by paleontologists. When this plant-eater's remains were first discovered, in a fossilized nesting ground in Montana known as "Egg Mountain," their proximity to a clutch of eggs prompted the conclusion that those eggs belonged to Orodromeus. We now know that the eggs were really laid by a female Troodon, the inescapable conclusion being that Orodromeus was hunted by these equally sized, but much smarter, theropod dinosaurs!