This is the fourth and final episode of Distillations’ series Our Chemical Landscape – a look at how science has shaped each of these four areas: the city, the suburb, the farm, and today, the wild. In this sound-rich show, we look at how animals use chemistry to communicate.

From the Distillations website:

First we learn about the firefly singles’ scene. And next, producer Diane Hope explores the clever ways residents of the Sonoran Desert interact while hiding from the harsh world around them.

Image courtesy of Flickr user kangotraveler.