Rauisuchians were very general in their eating habits in that they would have taken anything in their territorial range. Their teeth were usually thin, serrated and sharp so they could tear into flesh and pull out large chunks out of their prey so it would then die of blood loss or shock. The rauisuchians would have been able to rear up on their hind legs for a short amount of time because of their strong back legs and by using their tail as a counter balance. This would have been used to get a view of their area, scouting for enemies, looking for prey or to deliver the killing blow to their prey by using their big relative body weight. This wouldn't have applied for bipedal rauisuchians because they cere able to do this naturally if not being able to do it by default. The bipedal rauisuchians are
There was even a genus of sail-backed rauisuchian called Lotosaurus. This rauisuchian had a huge chest that tapered off to a slender tail, mainly because it was a herbivore, so its small head would have a strong base. This is the only example of a herbivorous rauisuchian, because all the other rauisuchians are medium to large carnivores that would have been nearly insatiable due to the lack of large prey items that could sustain them and the other prey being so small.
In the media
A postosuchus appeared in Walking With Dinosaurs episode one, New Blood, where it was at the top of the food chain, but at the end of the episode it was wounded and died of an infection.
It also appears in the british BBC show Primeval, where it killed a Eustreptospondylus.
Rauisuchians were the biggest land carnivores in the Triassic period and were the top predators when they first evolved.
They lived from Europe to North America to South America where they grew much larger, and became one of the biggest land carnivores ever.
They may look extremely similar to crocodiles, but they are only distantly related.