Monkey's bluff - Clever Monkeys - BBC Earth

Monkeys use calls to warn each other of predators - but do they ever raise false alarms so they can sneak a snack? Brilliant footage from BBC show Clever Monkeys. Watch more high quality videos on the BBC Earth YouTube channel here: http://www.youtube.com/BBCEarth and visit http://www.BBCEarth.com for all the latest natural history exclusives and fantastic new wildlife videos.