Costa Rica, which received a 2019 Champions of the Earth award, the United Nations’ highest environmental honor, for its role in protecting nature and combating climate change— hosts plenty of ecotours that offer zip-lining, mountain biking, kayaking, and birding.

The glass frog’s translucent skin reveals organs in action, including the heart pumping blood. Photograph by Piotr Naskrecki, Naturepl.com

But the nation is now discovering the value of a much smaller—and more threatened—natural asset. Lodges are building frog-friendly ponds; parks are leading frog-finding tours. Even the busy urban San José airport has a new frog-patterned carpet.

As the world gets hotter and drier, frogs’ future is in peril. Amphibians have survived the past four great extinctions, from ice ages to a meteor collision. But something is happening today that is causing amphibians to disappear at alarming rates, reports the National Geographic.