Olorotitan
Olorotitan (lat. Olorotitan - “titan swan”) is a non-avian dinosaur from the family of hadrosaurs that lived relatively recently. Just 72 to 66 million years ago. An almost complete skeleton of olorotitan was discovered in Russia, in the Amur region of Kundur. A wide, hollow ridge formed from the expanded bones of the skull was pierced by nasal passages and was probably used to produce trumpet sounds.