How did the predatory dinosaurs hunt? The examination of the teeth reveals the choice of prey, the bite technique

Dinosaurs became extinct more than 65 million years ago, but their eating habits are still understood. Some inhabitants of the earth fed on plants and bushes and dedicated themselves to their lives, but there were also some who feasted on smaller animals such as the famous theropod Tyrannosaurus rex.

The immense scale and diversity of these predators could have meant strong competition for other carnivorous dinosaurs that live at the same time. However, a recent examination of Coelurosaurus dinosaur teeth or bird-like theropods of the Upper Cretaceous – between 100.5 and 66 million years ago – suggests a completely different story.

"All these dinosaurs lived at the same time and place, so it is important to know if they competed for food resources or if they targeted different prey," Angelica Torices of the University of La Rioja said in a statement.

The researcher originally wanted to unite the dental remains with their respective dinosaur species, but soon, he began to examine how the animals used those teeth in the past.

Working in conjunction with colleagues at the University, Torices studied several bird-like theropods that once lived in modern Spain and Canada and discovered that they did not compete directly for their prey most of the time. The patterns of wear or small scratches observed on their blade-like teeth suggested that the animals followed a very similar hunting technique, but their objectives were mostly different.

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