Andrew Stuart

Gypsum landscapes occur globally, but they abound in the Chihuahuan Desert, from Coahuila and Durango to the Guadalupe Mountains in Texas and New Mexico’s White Sands. These white-sand outcrops are certainly harsh. But they’re also hotspots of biodiversity. That includes the complex, fragile ecosystems known as “biocrusts.”

Large swaths of West Texas are dominated by features called coppice dunes. These dunes reveal that, when human activity and extreme weather intersect, landscapes can be rapidly transformed.

When it comes to sand dunes in our region, we think of New Mexico’s White Sands, the Monahans Sandhills, or the Salt Basin Dunes near the Guadalupe Mountains. But there’s another great sand sea here.

Established in 1962, the National Natural Landmarks Program each year designates a handful of sites in public or private ownership that embody the best of the nation’s natural heritage. And the newest landmark is a West Texas property.

As archeological techniques and perspectives evolve, artifacts collected decades ago can be as revelatory as new finds.

Chirping frogs are typically less than an inch long, and you could mistake their whistling, trilling calls for an insect’s. But these little creatures have an epic story, one that distills the deep mysteries of biodiversity.

More than any mountains, mesas or canyons, the region's sand dunes distill the desert’s defining phenomenon, drought.

Five years ago, archeologists began excavating the San Esteban cave south of Marfa, searching for evidence of the Big Bend's earliest inhabitants.

At sunset tonight, a few thousand Mexican long-nosed bats will fly from a cave high in the Chisos Mountains. They’ll disperse to feast on agave nectar — pollinating the iconic plants in the process. These “agave bats” are deeply imperiled by human impact but for now, they’re holding their own.

At sunset tonight, a few thousand Mexican long-nosed bats will fly from a cave high in the Chisos Mountains. They’ll disperse to feast on agave nectar — pollinating the iconic plants in the process. These “agave bats” are deeply imperiled by human impact but for now, they’re holding their own.