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Marshy outposts capture the sound of frogs – and change

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Tamarac National Wildlife Refuge – In a remote northern Minnesota forest, biologist Lowell Deede makes his way to a small wetland to check an electronic recorder.

It looks like a wildlife camera that people strap on trees. But instead of a lense, it has microphones sticking out each side like ears. The recorder captures the sounds of frogs, birds and other wildlife in the marshy spot for five minutes every hour, seven days a week.

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Dan Gunderson
Dan Gunderson is based in Moorhead, Minn., and covers northwest Minnesota and North Dakota for MPR News. Minnesota Public Radio News can be heard in Brainerd on 88.3 FM or at MPRnews.org.
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