Thunderstorm in Everglades National Park (From "National Geo...

Wolf on Beach at Katmai National Park (From "National Geographic Soundscapes: National Parks USA")

Bear Family Chatting at Katmai National Park (From "National Geographic Soundscapes: National Parks USA")

Bear Family Hunting Salmon at Katmai National Park (From "National Geographic Soundscapes: National Parks USA")

Salmon Migration on Kinak River (From "National Geographic Soundscapes: National Parks USA")

Alligator Nest at Everglades National Park (From "National Geographic Soundscapes: National Parks USA")

Everglades National Park at Night (From "National Geographic Soundscapes: National Parks USA")

Fish Crow Sounds in Everglades National Park (From "National Geographic Soundscapes: National Parks USA")

Afternoon Sounds in Everglades National Park (From "National Geographic Soundscapes: National Parks USA")

Gopher Tortoise Burrows at Night in Everglades National Park (From "National Geographic Soundscapes: National Parks USA")