Wind down by escaping into nature. Part soundscape and part bedtime story, The Sleeping World is an intimate journey through ecologies around the world.

In the misty Puerto Rican El Yunque rainforest, coquí frogs no larger than your thumb fill the air with their distinctive two-note song: “co-quí, co-quí.” They alternate routines—one night singing to attract potential mates, the next hunting to fuel up for tomorrow’s performance. In this episode, we follow a singer and a hunter amid the vibrant nighttime chorus.

This is the world in its natural state, defined by seasons, routines, and cycles. By the time these tiny coquís are ready to let their fellow frogs sing them to sleep, you’ll be ready to sleep too.

Produced by Audible and Mumble Media
Written by Fil Corbitt
Narrated by Cynthia Kimola
Executive Producers for Mumble Media: Cara Ehlenfeldt and Jake Young
Executive Producer for Audible: Anna Stitt
Sound Design and Mix: Mumble Media
The Mumble Media team is Jaymeson Catsouphes, Cara Ehlenfeldt, Liz Mak, Lee Mengistu, David Tatasciore, Renée Vargas, Jake Young, and Sharif Youssef
Fact-Checker: Andrea López-Cruzado
Head of Creative Development: Kate Navin
Head of Audible Originals, North America: Marshall Lewy
Chief Content Officer: Rachel Ghiazza