Guanlong

Guanlong is a species of small tyrannosaur from the China during the Jurassic Period about 160 million years ago. It is an ancestor of the larger Tyrannosaurus Rex with a crest on its skull and was discovered in 2006 within the Shishugou Formation. In Amerlersa, it usually hunts in packs, mainly at night, and relies on agility, speed, and stealth to kill its prey.