It is one of the rarest midnight feasts ever captured on camera.
Under the moonlight on a deserted Costa Rican beach, a pregnant female jaguar, slowed by the weight of the cub inside her, paces at leisure towards prey she knows cannot escape.
What happens next - the culmination of weeks of rough living and patience by a BBC crew - is a television first.
The jaguar has timed her arrival on the Pacific coast perfectly - she pounces on a sea turtle which has beached in order to lay its eggs.
Shot on military grade thermal-imaging cameras, the footage shows her drag the stricken creature, which weighs as much as she does, up the beach and rip it apart for its meat.
The kill is the crowning moment of episode 2 of the BBC’s Big Cats series, which also follows the battle for survival of Africa’s youngest pride of lions in the Namibian desert, and the aquatic adventures of Asian fishing cats.
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