Big Bend National Park Thursday, 09.10.2009, 01:44am (GMT)
Chihuahuan Desert vegetation—bunchgrasses, creosote bushes, cactuses, lechuguillas, yuccas, sotols, and more—covers most of the terrain. But the Rio Grande and its lush floodplains and steep, narrow canyons form almost a park of their own. So do the Chisos Mountains; up to 20 degrees cooler than the desert floor, they harbor pine, juniper, and oak, as well as deer, mountain lions, bears, and other wildlife. A heavy rain transforms the desert: Normally dry creek beds roar with water, and seeds long dormant burst into fields of wildflowers.