Texas' state plant, the prickly pear cactus, is being devoured by invasive caterpillars. The red larvae with black spots are ...

Extending from the southeastern US states of Arizona, New Mexico and Texas deep into central Mexico, the Chihuahuan Desert offers a kaleidoscope ... important cross-border ecosystem. Overgrazing, ...

The species thrives there, feasting on the area’s abundant desert grasses ... the park — might lead one to conclude that it’s invasive. And some people have. The National Park Service ...