Indian runner ducks have been used in Asia for thousands of years to control pests. Now they're used in a South African vineyard to eat snails that damage the vines. Sarah Birnbaum for NPR hide caption

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Sarah Birnbaum for NPR

For This Vineyard, It's Duck, Duck, Booze

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An elephant at the Emmen, Netherlands, zoo stands at the edge of a ditch in 2009, a day after another elephant fell into the ditch and died. Olaf Kraak/AFP/Getty Images hide caption

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Olaf Kraak/AFP/Getty Images