This story is co-published with The Border Chronicle .

In the southwestern United States and northwestern Mexico lies a region boasting the highest biodiversity ... prompting the nickname “Sky Islands.” A unique array of geographic, topographic and ...

The higher you go, the greater the change, as new biomes ... Davis Mountains. Sky islands exist in other mountain ranges throughout the southwestern United States, northern Mexico, and elsewhere ...

Rising starkly from the desert floor, the 'sky islands' that make up Coronado ... over southeastern Arizona and crossing into western New Mexico. Totaling 1,780,000 acres, this federally protected ...