The Hermit Crab of Spiders

The Olios coenobitus spider lives in Madagascar, and it's basically the hermit crab of spiders: It hangs out in empty snail shells. In this video from the BBC's Madagascar, Sir David Attenborough narrates video of O. coenobitus spiders hoisting shells into plants using strands of silk, then hiding in them. Wow:
(Via The Kid Should See This.)