Listening to the sounds of frogs and toads

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Listening to the sounds of frogs and toads
Knowing the sound of frogs and toads is very important for Michigan Department of Natural Resources volunteers, whose job is to document what they hear, to make a count of frogs and toads in the wild. Scientists have documented declines in the population of frogs and toads since the 1980s, representing a critical threat to animal life on our planet. Kristen Bein reports.
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