How three species of monkey - howlers, red spiders and white-faced - use their different skills to fight for survival deep in the unpredictable and unforgiving tropical forests of Costa Rica.

Documentary about predator ants. While big predators bask in their own spotlight, tiny assassins are lurking in the shadows, waiting to attack. The driver ants of Africa can devour a horse in one day, while the jack jumper ant of Tasmania can kill a man with a single sting.

The Norfolk Broads is one of the last fragments of a vast swamp where ancient Britons hunted wildfowl and fished for perch and giant pike. Over the centuries most of the marsh and its wildlife were destroyed. The swamp is now recovering, and spectacular birds like avocets, marsh harriers, and cranes are back. Can the Broads be restored or will they be destroyed by rising sea levels?

David Attenborough is in the Swiss Jura Mountains to discover the secrets of a giant. Beneath his feet lies a vast network of tunnels and chambers, home to a huge empire of ants. It is believed to be one of the largest animal societies in the world, where over a billion ants from rival colonies live in peace. Their harmonious existence breaks many of the rules for both ants and evolution, and raises some important questions. Through winter, spring and into summer, David turns detective to find the answers.