Achillobator is an extinct genus of large dromaeosaurs from late Cretaceous Mongolia. They were close relatives of Dromaeosaurus and Utahraptor.


Though only known from a few remains, the available material paints a picture of a very large dromaeosaur, between 16 and 19 feet (4.8 - 5.8 meters) long and up to 800 pounds (362 kilograms); not much smaller than the largest known dromaeosaur, Utahraptor.

In The Land Before Time

A large pack of Achillobator are depicted in "The Lonely Journey", where they are shown running away from Red Claw and stampeding past Chomper.