We are still in dinosaur country. According to the Dinosaur Centre in Hughenden, the most distinguishing feature of the Muttaburrasaurus was its enlarged nasal passages. It is surmised that the big resonating chamber created a honking sound that could be heard by every other dinosaur in the surrounding district.
Muttaburrasaurus did have other interesting characteristics none the least of which was he munched on nothing but plant matter to stave off hunger. I imagine he could smell a cycad miles away with that snout.