In frogs’ croaks, volunteer hears nature’s pulse

Associated Press: Half an hour past sunset in rural western Hennepin County, Madeleine Linck strains her ears. She's listening, believe it or not, for the sounds of courtship. Frog courtship, that is. Linck is helping with a survey gauging the presence of the state's 14 frog and toad species. She's listening for the male mating call. "The females do no calling," Linck said. She offers no judgment on the family values of frogs. "The females, once they lay their eggs, usually disperse pretty quickly and......

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