When people think about habitats on Earth, they likely picture forests, oceans or grasslands. Few think to look up. Yet the lower atmosphere, or troposphere, may be the largest habitat on the planet.

A collective of land trusts, conservancies and tribes is capturing birdsong with audio gear and A.I. for clues about habitat health. Credit... Supported by By Cara Buckley Visuals by Meron Menghistab ...

If you liked this story, share it with other people. It has long been known that when terrestrial and aquatic habitats, vital at various times during a species’ life cycle, become disconnected due to ...