Species is a 1995 American science fiction thriller film directed by Roger Donaldson and written by Dennis Feldman. It stars Ben Kingsley, Michael Madsen, Alfred Molina, Forest Whitaker, Marg Helgenberger, and Natasha Henstridge in her film debut role. The film's plot concerns a motley crew of scientists and government agents who try to track down Sil (Henstridge), a seductive extraterrestrial-human hybrid, before she successfully mates with a human male.

Plot

During the SETI program, Earth's scientists send out transmissions (shown to be the Arecibo message) with information about Earth and its inhabitants, DNA structure, etc., in hopes of finding life beyond Earth. They then receive transmissions from an alien source on how to create endless fuel effortlessly. Therefore, the scientists assume that this is a friendly alien species. From a second alien transmission, the scientists receive information about an alien DNA along with instructions on how to splice it with human DNA. A government team led by Xavier Fitch goes forward with the genetic experiment attempting to induce a female, under the assumption that a female would have "more docile and controllable" traits. One of the hundred experimental ova produces a girl named Sil, who looks like a normal human but develops into a 12-year-old in three months.