In Jurassic Park, what type of dinosaur is the first one visitors see alive?

The first living dinosaur visitors see in Jurassic Park is a Brachiosaurus.

Alan Grant, Ellie Sattler, Ian Malcolm, and Donald Gennaro encounter the animal after arriving on Isla Nublar. The Brachiosaurus rises above the trees and feeds on high vegetation, giving the visitors their first direct proof that Hammond’s company has recreated living dinosaurs.

The scene is a major reveal because the film delays a full dinosaur encounter while building suspense. Grant’s astonishment, followed by the group’s reaction, establishes the scale and wonder of the park before the story turns toward danger.

Brachiosaurus was a long-necked sauropod from the Late Jurassic Period. The film’s creature design is based on scientific ideas available at the time, although later research and taxonomy have changed how some sauropod reconstructions are understood. The scene should not be confused with the sick Triceratops encountered later.