How one man finds food in every sidewalk crack.

A common butterfly could be an indicator of climate effects to come.

Doctors are now telling their patients to “take a hike”.

Coyotes have made a remarkable comeback in Chicago. What are the secrets to their survival in a dense metropolis? We hunted for clues with noted biologist Stan Gehrt.

There are two squirrel species in Chicago, and they are very particular about where they live. Gray squirrels tend to live in ritzy neighborhoods, while fox squirrels thrive in more affordable areas. A local biologist thinks he’s finally figured out why.

Chicago is a dangerous place…for migrating birds. But now scientists, architects, and dedicated volunteers are teaming up to make the city a leader in bird-friendly design and policy.

The monarch butterfly’s remarkable migration is in peril. Its habitat has been decimated by rapid urbanization and changing agricultural practices. Could cities come to the rescue?

They’re vacant, but not empty. We trekked through several vacant lots on Chicago’s south side, and found—amidst the discarded tires and construction debris—birds, bees, butterflies, and some very valuable plants.

If you want to know what Chicago looked like 200 years ago, head to the city’s southeast corner. Native wetlands, forests, and prairies all come together here, at a natural crossroads.