Southwestern desert birds live on the edge but have adapted over time. Now the evidence suggests they are struggling to adapt to rapid climate change.

The palo verde tree is native to the Sonoran Desert and other arid regions in the southwestern U.S. The plant boasts a verdant bark and golden blossoms and is a beacon of life in the desert.

In the Sonoran Desert, surrounded by five mountain ranges and 350 days of sunshine, lies Tucson where native edible plants ...