"Mommy's very angry." —Ian Malcolm

The Tyrannosaur Doe is a female Tyrannosaurus rex that appears in The Lost World: Jurassic Park. She is the mate of the Tyrannosaur Buck and mother of Junior. She can be differentiated from her mate in that she is a brown colour and has less pronounced brows.

The name "Tyrannosaur Doe" is not an official name, but since her mate is called the "Buck", then she must be a Doe, just like a female deer.

"All I want for my services is the right to hunt one of the tyrannosaurs. A male, a buck only." —Roland Tembo

The Tyrannosaur Buck is the male Tyrannosaurus Rex seen in The Lost World: Jurassic Park. He is the individual that hunter Roland Tembo seeks to hunt during his trip to Isla Sorna while accompanying the InGen Harvest team. This T. rex later is tranquilized by Roland Tembo and is taken to San Diego where the animal escapes and rampages before he is able to be rounded back and brought back to Isla Sorna. He is the father of Junior.