Jurassic Park Wiki
Movies   Books   Games   Toys   Theme Parks    

Tyrannosaurus (meaning "tyrant lizard") is an extinct genus of large theropod dinosaur. The species Tyrannosaurus rex (rex meaning "king" in Latin), often called T. rex or colloquially T-Rex, is one of the best represented mmber of the genus as well as all theropods. Tyrannosaurus lived throughout what is now western North America, on what was then an island continent known as Laramidia. Tyrannosaurus had a much wider range than other tyrannosaurids. Fossils are found in a variety of rock formations dating to the Maastrichtian age of the Upper Cretaceous period, 68-66 million years ago. It was the last known member of the tyrannosaurids and among the last non-avian dinosaurs to exist before the Cretaceous–Paleogene extinction event.

Like other tyrannosaurids, Tyrannosaurus was a bipedal carnivore with a massive skull balanced by a long, heavy tail. Relative to its large and powerful hind limbs, the forelimbs of Tyrannosaurus were short but unusually powerful for their size, and they had 2 clawed digits. The most complete specimen measures up to 12.3-12.4 meters (40.4-40.7 feet) in length and stands 3.66 meters (12 feet) tall, though T. rex could grow to lengths of around 13.2 meters (43.30 feet), up to 3.96 meters (13 feet) tall at the hips, and according to most modern estimates 8.4 metric tons (9.3 short tons) to 14 metric tons (15.4 short tons) in weight. Although other theropods rivaled or exceeded Tyrannosaurus rex in size, it is still among the largest known land predators and is estimated to have exerted the strongest bite force among all terrestrial animals. By far the largest carnivore in its environment, Tyrannosaurus rex was most likely an apex predator, preying upon hadrosaurs, juvenile armored herbivores like ceratopsians and ankylosaurs, and possibly sauropods. Some experts have suggested the dinosaur was primarily a scavenger. The question of whether Tyrannosaurus was an apex predator or a pure scavenger was among the longest debates in paleontology. Most paleontologists today accept that Tyrannosaurus was both an active predator and a scavenger.

Specimens of Tyrannosaurus rex include some that are nearly complete skeletons. Soft tissue and proteins have been reported in at least one of these specimens. The abundance of fossil material has allowed significant research into many aspects of its biology, including its life history and biomechanics. The feeding habits, physiology, and potential speed of Tyrannosaurus rex are a few subjects of debate. Its taxonomy is also controversial, as some scientists consider Tarbosaurus bataar from Asia to be a 2nd Tyrannosaurus species, while others maintain Tarbosaurus is a separate genus. Several other genera of North American tyrannosaurids have also been synonymized with Tyrannosaurus.

In March 2022, new studies revealed there are three species of Tyrannosaurus, due to their different femurs and teeth incisors. The two other species are Tyrannosaurus imperator ("tyrant lizard emperor") and Tyrannosaurus regina ("tyrant lizard queen").

As the archetypal theropod, Tyrannosaurus has been one of the best-known dinosaurs since the early 20th century and has been featured in film, advertising, postal stamps, and many other media.


Main article: Tyrannosaurus rex/Film


During the Late Cretaceous period, a feathered Tyrannosaurus was fighting a Giganotosaurus, but was swiftly killed by it by a combination of the Giga snapping its neck and the Rex falling off a ledge. A mosquito suck's the body's blood, which would later be used for cloning in the future.


Seven Tyrannosaurus rex were cloned by InGen scientists in their compound on Isla Sorna, circa 1990. The Tyrannosaurus, according to JurassicWorld.com, had lived on Isla Nublar for 25 years, so Tyrannosaurus was most likely born around 1990. This also means that it would have been 3 years old of age at the time of the Jurassic Park Incident.

Unlike the originals, the T. rex clones have been known to see only movement due to the mixture of frog DNA.[1] Like all of InGen's theropods, the T. rex clones have pronated wrists. These clones run speeds up to 32 mph instead of 15-25 mph.

Jurassic Park

The skeleton of a Tyrannosaurus rex was displayed in the center of the Visitor Center along with the one of an Alamosaurus. A female T. rex (named Rexy by fans) was also displayed in the Tyrannosaur Paddock, but failed to show up to the guests, even when a goat was brought out to feed her. When Dennis Nedry disabled the park's security, the T. Rex (after finally eating the goat) escaped and attacked the people. She ate Donald Gennaro and pushed Alan and the kids off a edge with the car, though they survived. As Robert Muldoon and Ellie were in the Tyrannosaur Paddock investigating the whereabouts of the survivors and had found Ian,the same T. rex attacked the search party. Muldoon and Ellie had heard the T. rex roar several times before during the search and just before her ambush, Ian heard her footsteps. The T. rex attacked suddenly, without warning, crashing through a line of trees where she began chasing them through a tree lined corridor. After a very close chase, she was unsuccessful in catching them and so finally gave up, letting the trio escape to the Visitor Center. The next day, Rexy chases a herd of Gallimimus and kills one before eating part of it. Later,she breaks into the Visitor Center and kills a raptor and The Big One, smashing the Tyrannosaurus skeleton in the process. She roars as the "When Dinosaurs Ruled The Earth" banner falls to the ground.

The Lost World: Jurassic Park

A family of T. rexes are featured in this movie: The Buck, The Doe and Junior. The parents put Ian, Sarah and Nick's car over the edge and ate Eddie Carr. Later, they attack the camp and everyone tries to escape when Carter is stomped and crushed by the Doe and Burke is eaten. Later, Roland Tembo chases the male down and it is transported to San Diego where it kills everyone on the SS venture and is released in the city but is then captured again by Ian and Sarah and transported back to Isla Sorna with Junior.

Jurassic Park III

A male Tyrannosaurus rex emerged while feeding on a Parasaurolophus carcass and encounters the humans. It chases them and fights a Spinosaurus, and loses the battle.

Jurassic World

Rexy was seen eating a goat. After the Indominus rex escapes, goes on a rampage and kills 2 raptors, she is released and fights the I. rex. At first,Rexy bites the I.Rex's neck multiple times but the Indominus Rex overpoweres her. Blue comes to Rexy's aid and they push the hybrid towards the Jurassic World Lagoon, where the Mosasaurus kills the Indominus. Rexy roars on the helipad.

Jurassic World: Camp Cretaceous

Season 2

Rexy appeared in this season, she kills a Parasaurolophus and attacks the campers but is distracted by a recording of Brookylnn and a hologram T. rex. Later, Rexy chases a herd of dinosaurs but they escape. Rexy also kills Mitch in revenge for electrocuting her.

Season 3

Rexy attacks the helicopter but it escapes. She chases the campers but Darius and Brooklynn throw rocks at her and she chases them. A voice distracts her. As seen below, she is chasing a mercenary named Jack. After Jack gets on a ladder his team on the helicopter threw down, the Tyrannosaur grabs the ladder with her jaw and proceeds to pull the helicopter down with her strength. However, she ends up biting off the bottom of the ladder, which allows Jack and the other mercenaries to escape, before the Mosasaurus jumps up and devours Jack.

Season 4

It is revealed that there are other Tyrannosaurs when the campers arrive on Mantah Corp Island. Dr. Mae Turner, a behavioral paleoneurobiologist studied the behaviors of a mother and daughter pair nicknamed Big Eatie and Little Eatie. Kash D. Langford, Dr. Turner's boss had the rexes food supply altered with drugs that made the dinosaurs attack each other. Little Eatie was severely injured, while Big Eatie was forced to fight a Kentrosaurus named Pierce, though both managed to survive when the fight was called off. The fate of these dinosaurs remains unknown as of 2016.

Jurassic World: Fallen Kingdom

Rexy chases a mercenary named Jack. After Jack gets on a ladder his team on the helicopter threw down, the Tyrannosaur grabs the ladder with her jaw and proceeds to pull the Helicopter down with her strength. However, she ends up biting off the bottom of the ladder, which allows Jack and the other mercenaries to escape, before the Mosasaurus jumps up and devours Jack. During the eruption of Mount Sibo, Owen and his group encountered Rexy when she bites and fatally subdues an attacking Carnotaurus. She then fled and was rescued alongside other dinosaurs. Sometime later on, Owen and Claire found her sedated in a truck, where they needed to get some of her blood for transfusion for Blue, who had been shot awhile back by one of Wheatley's mercenaries. As they got some of her blood, Claire rode on the theropod’s back while trying to hand the blood bag to Owen. After being locked in by one of the mercenaries, Owen looked into the Tyrannosaur's eye as she awoke from her sedation. Finding herself in an enclosed space with people around her, the mighty theropod started to panic and break free of her restraints, with Owen being forced to jump through her snapping jaws to get out of the truck.Later, the T. rex was lured to her cell located beneath the Lockwood estate with a goat in order have her prepared to be sold off to wealthy buyers in an auction set up by Eli Mills and Gunnar Eversol. However, some poisonous gas was released into the holding cell during Blue's brawl with some mercenaries, threatening to kill the dinosaurs yet again. The T. rex was eventually freed along with the other dinosaurs through Claire opening all the cell doors and Maisie, who had just lost her grandfather and learned of her true origin, opening the gate that set them all free and allowing the T.rex to escape the manor. Before she left the premises, however, the T. rex caught and ate Mills after, scaring off a lone Carnotaurus that had tried to join the feast. Finishing off what little remained of Mills, the T. rex then brought one of her massive feet down on the I. rex's only surviving bone fragment and DNA sample as she stomped off into the woods, crushing it to smithereens and with it any chance of other hybrids like her returning. After she escaped, the T. rex broke into a nearby zoo and roared at an male lion, who stood his ground by angrily roaring back at her.

Jurassic World Dominion

During the Cretaceous period, Rexy's non-clone version fights a Giganotosaurus but dies. In present day time, the T. rex is seen running from a helicopter attempting to tranquilize her. She finds herself at a drive-in theater where she flips over cars and breaks through the screen of the theater as the helicopter finds her again. They fire a tranquilizer dart at her but it hits a car instead, breaking the windshield without harming the passengers inside. The T. rex evades the helicopter again and escapes back into the wilderness. (to be continued)


Main article: Tyrannosaurus rex/Novels

Jurassic Park Institute

There are several entries in the glossary of the Jurassic Park Institute that refer to Tyrannosaurus. There is an entry for both Tyrannosaurus rex and Tyrannosaurus bataar, which is also known as Tarbosaurus. There is also a third entry which was named Dinotyrannus, which is synonomous to Tyrannosaurus rex.

Behind the scenes


Tyrannosaurus rex/Gallery

Jurassic Park Dinosaurs
BrachiosaurusDilophosaurusGallimimusParasaurolophusTriceratopsTyrannosaurus rexVelociraptor
Jurassic Park: The Game Dinosaurs
CompsognathusDilophosaurusHerrerasaurusParasaurolophusPteranodonTroodonTriceratopsTylosaurusTyrannosaurus rexVelociraptor
The Lost World: Jurassic Park Prehistoric Creatures
CompsognathusGallimimusMamenchisaurusPachycephalosaurusParasaurolophusPteranodonStegosaurusTriceratopsTyrannosaurus rexVelociraptor
Jurassic Park III Prehistoric Creatures
AnkylosaurusBrachiosaurusCeratosaurusCompsognathusCorythosaurusParasaurolophusPteranodonSpinosaurusStegosaurusTriceratopsTyrannosaurus rexVelociraptor
Jurassic World Dinosaurs
AnkylosaurusApatosaurusDimorphodonGallimimusIndominus rexMosasaurusPachycephalosaurusParasaurolophusPteranodonStegosaurusTriceratopsTyrannosaurus rexVelociraptor
Jurassic World: Fallen Kingdom Prehistoric Creatures
AllosaurusAnkylosaurusApatosaurusBaryonyxBrachiosaurusCarnotaurusCompsognathusGallimimusIndoraptorMosasaurusParasaurolophusPteranodonSinoceratopsStegosaurusStygimolochTriceratopsTyrannosaurus rexVelociraptor
Jurassic World: Camp Cretaceous Dinosaurs
AnkylosaurusBaryonyxBrachiosaurusCarnotaurusCeratosaurusCompsognathusDilophosaurusDimorphodonGallimimusIndominus rexKentrosaurusMonolophosaurusMosasaurusOuranosaurusParasaurolophusParasaurolophus luxPteranodonScorpios rexSinoceratopsSino-SpinoSmilodonSpinosaurusStegosaurusTyrannosaurus rexVelociraptor
Jurassic World: Dominion Prehistoric Creatures
AllosaurusAnkylosaurusApatosaurusAtrociraptorBaryonyxBrachiosaurusCarnotaurusCompsognathusDilophosaurusDimetrodonDimorphodonDreadnoughtusGallimimusGiganotosaurusIguanodonLystrosaurusMicroceratusMorosMosasaurusNasutoceratopsOviraptorParasaurolophusPteranodonPyroraptorQuetzalcoatlusSinoceratopsStegosaurusStygimolochTherizinosaurusTriceratopsTyrannosaurus rexVelociraptor