Brachylophosaurus

Brachylophosaurus canadensis is a mid-sized hadrosaurid or duck-billed dinosaur found in the Upper Cretaceous sediments of North America. One of the more notable features of this animal is the bony crest for which this animal was named. It reached lengths of about 30ft (9m) when full grown. Brachylophosaurus was first discovered in Canada in 1936. The Judith River Formation in Montana has since revealed many relatively complete and intriguing specimens. The Judith River formation in Montana is 75 to 78 MYA.