Livestock grazing and urban development, along with the ever-increasing use of off-road vehicles, continue to degrade the tortoise's vanishing habitat ... now called Agassiz's desert tortoises, or ...

Under the unyielding desert sun, a quiet yet fierce struggle for survival is underway. Here, among the creosote bushes and ...

The curve-billed thrasher—the common thrasher of the rich, cactus-laden Sonoran Desert—can be very conspicuous ... Adults distinctive; note different habitat and calls compared with the ...