Why do some animals burrow?

Dawn learns that living in an oversized burrow is not the best home for a hippo. Kids have fun burrowing in popcorn with popsicle sticks. To watch more kids .\r
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This is1 of The Burrowers: Animals Underground, a series looking at how Badgers, Water Voles and Rabbits live underground using replica burrows to .\r
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We are on the vast plains of Venezuela. Burrowing owls are fond of lizards, rats and frogs, but theyll hunt just about anything as long as its not too big.