Sir David Attenborough narrates a documentary about the Kea, the world's only alpine parrot. Playful and destructive, it attacks cars, starts landslides and terrorises New Zealand ski resorts but behind the bad behaviour there's a sharp mind at work. David tries to play chess with a kea and discovers how its cheeky character is the key to its survival.

"The Silent Alps" explores a forgotten massacre that is widely unknown in the modern era, the history of Kea culling in New Zealand