When it says "A Steven Spielberg film" at the end of the movie, listen closely. You will hear the slightly modified five tones from Close Encounters of the Third Kind (1977).
When the Universal logo appears, instead of the studio's theme, sounds from wildlife are heard.
There are no opening credits after the title has been shown.
The credits are in a jungle typeface.
The closing shot of the helicopter flying towards the horizon forms an initial backdrop for the end credits.