Acclaim Entertainment and Activision had both bid for the rights to produce the Sega Genesis version of "Jurassic Park", but lost to Sega. Doug TenNapel, who created "Earthworm Jim", was the lead artist for the development team. The game's animators consulted experts who worked on the film on how the game's dinosaurs should look. The development team also consulted with paleontologist Robert Bakker, who dissected a supermarket chicken to demonstrate the similarities of dinosaur anatomy to bird anatomy. Bakker also appeared in a commercial for the game. For the game to reflect the latest dinosaur discoveries and theories, the development team took field trips to museums of natural history; and to zoos to observe the feeding habits and physical movements of birds and reptiles, such as ostriches and alligators.