Exploring the Sky Islands: Arizona and Mexico’s Biodiversity Hotspot

The U.S.-Mexico border wall, now stretching over 1,000 kilometers through Arizona, New Mexico, and the Mexican states of Sonora and Chihuahua, has become one of the most significant human-made barriers to wildlife migration in North America, according to conservation scientists and government reports. Since construction began in earnest in the 1990s and accelerated under recent … Read more