The effects crew used two hundred fifty gallons of oatmeal to simulate Spinosaur droppings.
A few of the action sequences are borrowed from left over ideas from the first two Jurassic Park movies, some of which were in the original scripts and made it as far as being storyboarded before they were scrapped due to time and budget constraints. These scenes include the pteranodon and river boat sequences.
When asked why he accepted the role of Paul Kirby, William H. Macy replied, "Because I'm fifty years old and I get to fight a dinosaur".
Sir Sam Neill, as part of his contract, requested that the Australasian premiere of this movie take place in his hometown of Dunedin, New Zealand.
Michael Crichton worked with the screenwriters several days to brainstorm about a story, but left after several days when he could not come up with a satisfactory idea.