Film-maker Luc Jacquet refused to include footage of penguins copulating in his new movie documentary THE MARCH OF THE PENGUINS - because it would be pornographic.

The film - originally titled LA MARCHE DE L'EMPEREUR - has recently become the most successful French language movie ever at the US box office, but Jacquet admits it required careful editing.

And he insists scenes of sexual intercourse would have ruined the love story at the centre of his unusual piece.

He says, "For me that would be the difference between pornography and eroticism.

"If you reduced human stories to copulation, reproduction and raising children, you'd have had it. But we have had 1,000 years of love stories, and no two have been the same."