Suggesting that Tyrannosaurus may have been pack hunters, Philip J. Currie compared T. rex to related species Tarbosaurus bataar and Albertosaurus sarcophagus, citing fossil evidence that may indicate pack behavior.
A find in South Dakota where three T. rex skeletons were in close proximity suggested a pack.
Because available prey such as Triceratops and Ankylosaurus had significant defenses, it may have been effective for T. rex to hunt in groups.

Currie's pack-hunting hypothesis has been criticized for not having been peer-reviewed, but rather was discussed in a television interview and book called Dino Gangs.
The Currie theory for pack hunting by T. rex is based mainly by analogy to a different species, Tarbosaurus bataar, and that the supposed evidence for pack hunting in T. bataar itself had not yet been peer-reviewed.
According to scientists assessing the Dino Gangs program, the evidence for pack hunting in Tarbosaurus and Albertosaurus is weak and based on skeletal remains for which alternate explanations may apply (such as drought or a flood forcing dinosaurs to die together in one place).
Fossilized trackways from the Upper Cretaceous Wapiti Formation of northeastern British Columbia, Canada, left by three tyrannosaurids traveling in the same direction, may also indicate packs.

Evidence of intraspecific attack were found by Joseph Peterson and his colleagues in the juvenile Tyrannosaurus nicknamed Jane.
Peterson and his team found that Jane's skull showed healed puncture wounds on the upper jaw and snout which they believe came from another juvenile Tyrannosaurus.
Subsequent CT scans of Jane's skull would further confirm the team's hypothesis, showing that the puncture wounds came from a traumatic injury and that there was subsequent healing.
The team would also state that Jane's injuries were structurally different from the parasite-induced lesions found in Sue and that Jane's injuries were on her face whereas the parasite that infected Sue caused lesions to the lower jaw.
Suggesting that Tyrannosaurus may have been pack hunters, Philip J. Currie compared T. rex to related species Tarbosaurus bataar and Albertosaurus sarcophagus, citing fossil evidence that may indicate pack behavior. A find in South Dakota where three T. rex skeletons were in close proximity suggested a pack. Because available prey such as Triceratops and Ankylosaurus had significant defenses, it may have been effective for T. rex to hunt in groups.
Currie's pack-hunting hypothesis has been criticized for not having been peer-reviewed, but rather was discussed in a television interview and book called Dino Gangs. The Currie theory for pack hunting by T. rex is based mainly by analogy to a different species, Tarbosaurus bataar, and that the supposed evidence for pack hunting in T. bataar itself had not yet been peer-reviewed. According to scientists assessing the Dino Gangs program, the evidence for pack hunting in Tarbosaurus and Albertosaurus is weak and based on skeletal remains for which alternate explanations may apply (such as drought or a flood forcing dinosaurs to die together in one place). Fossilized trackways from the Upper Cretaceous Wapiti Formation of northeastern British Columbia, Canada, left by three tyrannosaurids traveling in the same direction, may also indicate packs.
Evidence of intraspecific attack were found by Joseph Peterson and his colleagues in the juvenile Tyrannosaurus nicknamed Jane. Peterson and his team found that Jane's skull showed healed puncture wounds on the upper jaw and snout which they believe came from another juvenile Tyrannosaurus. Subsequent CT scans of Jane's skull would further confirm the team's hypothesis, showing that the puncture wounds came from a traumatic injury and that there was subsequent healing. The team would also state that Jane's injuries were structurally different from the parasite-induced lesions found in Sue and that Jane's injuries were on her face whereas the parasite that infected Sue caused lesions to the lower jaw.
Tyrannosaurus