Wildlife of the Concho Valley

The Concho Valley, named from the abundant mussel shells found in its principal river by seventeenth-century Spanish explorers, occupies a transitional position between the Chihuahuan Desert to the west and the Balcones Canyonlands to the east. As veteran field biologist and educator Terry C. Maxwell notes, the region has experienced wide-ranging changes in the makeup of its vertebrate populations, especially in the decades since farming and ranching began here in earnest, in the mid- to late 18