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