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Did tyrannosaurs hunt in packs?

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Sue, a dinosaur fossil (Tyrannosaurus rex) — tyrannosaur The fossilized remains of Sue, the most complete *Tyrannosaurus rex* skeleton in the world, on display at the Field Museum of Natural History, Chicago.

Whether tyrannosaurs hunted in packs remains a subject of scientific debate, and it has not been proven conclusively.12

While some Tyrannosaurus rex fossils have been discovered in groups, these rare occurrences of multiple skeletal remains do not definitively confirm pack-hunting behavior. Some researchers suggest that such groupings might instead indicate individuals gathering for the common purpose of scavenging at a carcass. Additionally, some paleontologists argue that the small forelimbs of these dinosaurs may have evolved to avoid injury during competitive feeding when multiple individuals gathered together, rather than as an adaptation for cooperative hunting.312

Ultimately, scientists do not know for certain if T. rex hunted alone or in packs, or if it primarily pursued live prey or scavenged.42