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Nature's death knell: How a frog's love song is a bat's dinner bell

Love hurts for Panama's Tungara (PRON: toonga-ra) frog. The amphibians' love song beckons not only potential mates but also its moral enemy, the fringe-lipped bat. Researchers at the Smithsonian Tropical Research Institute in Panama say it's a classic case of natural selection versus the instinct for survival. Sharon Reich reports.