They form a sophisticated society, with intricate communication. Prairie dogs are remarkable for their intelligence and sociability. And they're a “keystone species” – a foundation of biodiversity – on the West Texas plains.

They nearly disappeared. Our region was once home to half a billion prairie dogs. Less than 2 percent remain.

For one West Texan, conserving these iconic animals is a profession. She's known as “the prairie dog lady.” During 35 years, Lynda Watson has rescued and relocated 110,000 prairie dogs.

What does it mean for an animal to be a “keystone species”? To understand, visit a prairie dog town.

“Have you ever got to see a really big prairie d...