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| Description: The only species other than the Venus flytrap to actively trap its meal is the waterwheel (Aldrovanda vesiculosa). This European aquatic plant floats free on the water, rootless, consuming small crustaceans, insect larvae and snails. Its snapping behavior was first observed in 1861, but the plant’s carnivorous nature wasn’t proven until Charles Darwin studied the waterwheel more than a decade later.
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