1.16 Inch Edmontosaurus Tail Vertebrae

Here is a tail vertebrae of Edmontosaurus annectens more commonly known as a "duck-billed" dinosaur. It's from the Hell Creek Formation of Montana and is approximately 66 million years old.

Hadrosaurs are frequently referred to as duck-billed dinosaurs and are members of the ornithischian family Hadrosauridae They were fairly common herbivores which roamed Asia, Europe and North America during the Upper Cretaceous Period. Many species of hardrosaurs had distinct crests on their head, some of which had air filed chambers that may have produced a distinct sound. These crests may have been used for both audio and visual display purposes.