Mei long (name meaning ''Sleeping Dragon'') is a genus of troodontid dinosaur that originated during the Early Cretaceous in what is now Asia. Measuring just over two meters long, this lethal predator was related to raptors.
In the Series 2 episode "Dinobirds," a pack of Mei Long were brought to the park from Early Cretaceous China, 125 million years ago. They reside in the Raptor Peak Enclosure.