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
Jurassic Park III Isla Sorna. The boat's crew mysteriously disappears, forcing Ben to detach the line. He and Eric drift towards the island. In the United States, paleontologist and Jurassic Park survivor Dr. Alan Grant has made a new discovery about the intelligence of "Velociraptors", but struggles to secure funding for his research because of that has revealed the existence of the de-extinct dinosaurs. Grant discusses his discovery of a resonating larynx on a fossilized raptor remains with his former lover and colleague Dr. Ellie Sattler. This, and his experience at Jurassic Park, leads him to believe the original "Velociraptors" were socially sophisticated.