c. 67 million years ago, Amur Region, Far Eastern Russia

An adult male Olorotitan in full breeding regalia wades through a shallow river. The fossil skeleton of this 9 metre long herbivore was discovered in 1999 near the town of Kundar and is currently housed at the Amur Natural History Museum in Blagoveschensk. Described in 2003 as Olorotitan arharensis ("Giant swan from Arhara County"), it is as yet the most complete Russian dinosaur skeleton ever found.

Olorotitan was a lambeosaurine hadrosaur, the group of hollow-crested duck-billed dinosaurs that includes the North American Parasaurolophus of Jurassic Park fame.  Olorotitan had a huge cranial crest shaped like a rearward-facing hatchet blade, quite unlike that of any other dinosaur yet discovered. The vertebral column was also weird with elongated neck and sacral regions while the the anterior 1/3 of the tail had extra articulations on top of the neural spines.