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Sir David Attenborough examines the mysteries behind some of nature's most fascinating creatures and plants.

Both the rhino and the hedgehog protect their bodies with formidable armour. Are these defences really what they seem? The rhino's thick folds of skin are in fact surprisingly sophisticated radiators. But what other purpose could a hedgehog's spines have apart from protection? Catching apples, perhaps?

Some animals have mastered the art of deception. The cuckoo lays its eggs in the nest of other birds and tricks them into raising its young, while the spooky looking death's-head hawkmoth deceives hundreds of bees to steal their honey. How do these cheats and imposters get away with it?