Jurassic Park III dinosaur-bird connection, said the feathers quills added to the "Velociraptor" for "Jurassic Park III" "looked like a roadrunner's toupee", but conceded that feathers are difficult subjects for computer animation and speculated that "Jurassic Park IV"'s raptors would have more realistic with plumage. In 2002, Crichton said he had not watched the film. A teaser trailer was released online in September 2000. Universal avoided excessive early marketing to prevent a possible backlash; the studio believed awareness of the film was already sufficient. Marketing began in April 2001, three months before the film's release. The first footage from the film was aired
The Lost World: Jurassic Park (console game) and sets. Spielberg regularly checked on the progress of the game, and also offered creative input. Spielberg was particularly helpful in providing technical information about dinosaurs to the developers. Bryan Franklin and Erik Kraber of Franklin Media worked on the game's sound effects; they had previously created sound effects for "Jurassic Park: The Online Adventure" and . The creature sound effects were created using thousands of animal noises, such as beluga whale songs, vermilion flycatcher clicks, and the grunts of baby jaguars, as well as humans blowing through a 12-foot vacuum tube. A total of 1,400 sounds were created for