Tarbosaurus
A large Asian tyrannosaurid theropod, Tarbosaurus filled the same sort of ecological niche that Tyrannosaurus rex did in North America. It was around the same height and length as its bulkier counterpart, and would have hunted the large herbivorous dinosaurs around it at the time. Being more lightweight, it probably would have hunted more often than Tyrannosaurus did, with the latter being too large to probably support itself by hunting alone, and would have scavenged for a considerable part of its diet.

Juvenile animals had a much weaker skull and teeth than the adults, meaning they would have fed on different prey and so reduced competition between them, increasing the survival rate of their young by not limiting their food.

Tarbosaurus also had a thin skull with sideways pointing eyes, unlike the wide skull and forward facing eyes of Tyrannosaurus. To compensate for weak vision Tarbosaurus had very well developed senses of hearing and smell— relying instead on these two to hunt.

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