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Counting frogs' croaks will help your neighborhood

...area. Through a program called Frogwatch USA, volunteers around the country...frogspeak. Results can be returned to Frogwatch USA electronically, or by regular mail. Started last spring, Frogwatch USA is monitoring more than 500 sites...

http://chronicle.augusta.com/stories/2000/03/19/tec_285068.shtml
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