Plants amazingly dominate this green world by employing poisons, recruiting defensive armies, feeding off the dead and using animals for pollination and seed dispersal. For predators this world presents exceptional challenges, not only in finding prey in such a tangled place, but in how to deal with the toxins that so many animals and plants are laced with.
New Zealand was one of the last land masses to be found and settled by people. Lush and fertile, almost everything brought here flourishes, often with surprising consequences. Told through the experiences of its native species - in particular, a charismatic and peculiar giant, flightless parrot - this is the moving story of the changing fortunes of New Zealand's wildlife since humans first arrived.
This episode follows the animals of Argentina, living life at the mercy of the Andean mountains. These peaks dictate a hard existence for every living creature from their summits to the very edge of the Patagonian steppe, forcing even the cutest resident to turn carnivore.
This episode continues the study of mammals, and particularly those whose young gestate inside their bodies. Attenborough asks why these have become so varied and tries to discover the common theme that links them. Examples of primitive mammals that are still alive today include the treeshrew, the desman and the star-nosed mole. Insect eaters vary enormously from the aardvark, giant anteater and pangolin to those to which much of this programme is devoted: the bats, of which there are nearly 1,000 different species. These took to flying at night, and its possible that they evolved from treeshrews that jumped from tree to tree, in much the same way as a flying squirrel.
Cameras travel to the Arctic and Antarctic circles, following chicks in a king penguin colony on the island of South Georgia in the Southern Ocean. On the other side of the world, Spy Walrus discovers a walrus family hauled out on an ice floe, before Spy Gyrfalcon follows the family as they head towards dry land. Elsewhere on Norway's Hornoya island, Spy Puffin follows thousands of male puffins as they gather in the snow and search for their life-long partners.