ops and the Edmontosaurus. But the question has always been whether they would have also had a different feeding strategy when they were young and smaller,» Schroeder explained. The discovery of the hind legs of the two baby dinosaurs in the stomach of the adolescent tyrannosaur suggests that these younger predators were They focused on smaller, more agile prey, rather than attacking large herbivores. «That really confirms our suspicions that young tyrannosaurs specialized in this type of hunting for small, fast prey, and then as they grew, they switched to a more specialized feeding strategy for larger, heavier animals,» Schroeder said. The discovery also provides insight into how tyrannosaurs evolved and how they adapted to different environments and food resources throughout their lives. «It’s a very interesting story. how these iconic predatory animals, like T. rex, the largest and most ferocious, probably started out as small, agile prey hunters and then evolved to become the apex predators of the late Cretaceous,» Schroeder concluded.

Prehistoric Smuggling: 6,400 Fossils Prevented from Leaving Argentina

Researchers have made an incredible discovery, finding the preserved remains of a tyrannosaur’s last meal inside its stomach cavity. The findings, published in the journal Science Advances, reveal that the dinosaur’s meal consisted of the hind legs of two baby dinosaurs, providing valuable insight into the diet of these ancient creatures.

A Rare Discovery

Preserved dinosaur guts and evidence of their diets are extremely rare in the fossil record, making this discovery particularly exciting. It is the first time that the stomach contents of a tyrannosaur have been found, shedding light on the feeding habits of these iconic predators.

A Fascinating Species

The tyrannosaur in question is a young Gorgosaurus libratus, weighing about 772 pounds and measuring 13 feet in length at the time of its death. This species is a cousin of the famous T. rex and roamed Alberta and North America during the late Cretaceous period.

A Picky Eater

The preserved remains indicate that the young tyrannosaur had a preference for the hind limbs of its prey. The researchers believe that it killed two baby dinosaurs, known as Citipes elegans, and only consumed their hind legs, leaving the rest of the carcasses behind. This suggests that the teenager had a particular appetite for thighs.

A Window into the Past

The almost complete skeleton of the young Gorgosaurus was discovered in Alberta’s Dinosaur Provincial Park in 2009. It wasn’t until recently that the preserved stomach contents were noticed during the fossil’s preparation in the lab. This finding provides valuable information about the dietary patterns of large predatory dinosaurs.

Changing the Appetite of Top Predators

This fossil discovery confirms a long-suspected dietary pattern among large predatory dinosaurs. Young tyrannosaurs, like the one found, had different diets compared to their fully grown adult counterparts. The researchers believe that as the tyrannosaurs grew, their feeding behavior and diet changed.

Direct Evidence

While scientists had previously hypothesized about the dietary differences between young and adult tyrannosaurs, this fossil find provides direct evidence. The preserved stomach contents offer a glimpse into the diet of the young tyrannosaur, which consisted of small, fast prey. This is likely because the predator’s body was not yet prepared for larger prey.

A Missing Piece of the Puzzle

The voracious appetite of adolescent tyrannosaurs and other carnivores may explain the scarcity of small and medium-sized dinosaurs in the fossil record, particularly during the middle and late Cretaceous period. The hunting activities of young tyrannosaurs could have filled a niche in the ecosystem, leading to the absence of other predators of similar size.