Olorotitan, an imposing dinosaur from the Late Cretaceous period was unearthed in the Nemegt Formation of Mongolia and Russia, Olorotitan belongs to the Hadrosauridae family, a group of ornithopod dinosaurs commonly referred to as duck-billed dinosaurs. The genus name "Olorotitan" is derived from the Greek words "oloros" (swan) and "titan" (giant), a nod to its graceful swan-like crest and imposing size. It is considered a member of the Lambeosaurinae subfamily.

This dinosaur specimen marked a significant milestone as the initial extensively preserved example to be documented in Russia. Furthermore, it stands as the most comprehensive lambeosaurine skeleton found beyond the confines of western North America.

Olorotitan was a large dinosaur, measuring approximately 8-10 meters in length and weighing several tons. One of its most distinctive features was its elaborate cranial crest, which resembled the bill of a swan. This crest likely played a role in visual display and communication, and its shape and size may have varied among individuals or between sexes.

Being a member of the hadrosaurid family, Olorotitan likely adopted a bipedal or quadrupedal herbivorous lifestyle, consuming vegetation. Its intricate skull enabled a grinding action reminiscent of chewing, facilitated by a multitude of constantly regenerating teeth. The notable, voluminous, and hollow crest, emerging from enlarged skull bones housing nasal passages, is believed to have served purposes such as visual and auditory identification.