Continuity mistake: The burnout of Houston takes place at nighttime, but when the bees attack an ambulance driver who then crashes into a building, the scene changes briefly to broad daylight.
Revealing mistake: When the bees attack the train during the evacuation scene, a guard falls backwards and his arm hits a lever. You can see that the 'bees' in this scene are just colored pellets.
Trivia: Irwin Allen was so disheartened by the amount of money he lost on this film that he forbade any of his employees to ever mention it again, and even cut short an interview when a question was asked about it.
Trivia: Irwin Allen used 22 million bees in this movie. This is largest cast of live animals in a feature film.
Brad Crane: Are you endowing these bees with human motives? Like saving their fellow bees from captivity, or seeking revenge on Mankind?
General Thalius Slater: I always credit my enemy, no matter what he may be, with equal intelligence.
Brad Crane: We've been fighting a losing battle against the insects for fifteen years, but I never thought I'd see the final face-off in my lifetime. And I never dreamed, that it would turn out to be the bees. They've always been our friend.