|Time period :||Early Cretaceous period|
|In the series|
|Brought back :||None|
Mei long (or just Mei) were featured in the third episode of Prehistoric Park, where they attacked Ben (One of Nigel's crew) for the meat in his backpack. Before that attack, Mei had recently raided the campsite, shredding the sleeping bags, tents and other food bags, leaving a scratch mark on one of the tents. Later a pack of Mei were found dead near a volcano, suffocated by the toxic gas cloud in their sleep. They were also known as the 'Sleeping Dragons' according to paleontologists .
- While the Mei long do have a feather coating, they are missing wings and a tail fan.
- Mei long in the series were the size of a small child-about the size of Troodon. It is not out of the question that they even used the same CGI Model. In real life, Mei long were the size of a chicken. However the holo type of Mei long was a young juvenile and adults in real life were probably about the same size as Troodon.