Some adorable pikas wait all winter for the sun to shine, so they can gather food and build their nests. But other cheeky pikas wait for their neighbours to do the hard work, while they sit back and wait for the perfect time to strike.

Born to survive. Built to thrive.

#Mammals #iPlayer #DavidAttenborough #Nature

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Found in every ocean and on every continent, Sir David Attenborough reveals the world of mammals and the secrets of their success.

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