Moraine Park is a grassy valley inside Rocky Mountain National Park. Wes Lindamood/NPR hide caption

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Beyond Sightseeing: You'll Love The Sound Of America's Best Parks

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The half-naked hatchetfish, shown here munching on a shrimp, is just one of many billions of mesopelagic ocean fish that migrate up and down the water column each day to hunt food and avoid predators. Wikimedia hide caption

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Mysterious Ocean Buzz Traced To Daily Fish Migration

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Male treehoppers make their abdomens thrum like tuning forks to transmit very particular vibrating signals that travel down their legs and along leaf stems to other bugs — male and female. Courtesy of Robert Oelman hide caption

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Good Vibrations Key To Insect Communication

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African forest elephants stampede in the Central African Republic jungle. Courtesy of Cornell Lab or Ornithology hide caption

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To Decode Elephant Conversation, You Must Feel The Jungle Rumble

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Ornithologists Uncover One Listener's Shy Backyard Tweeter

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