For centuries, Mexican gray wolves roamed the Southwest. But as cattle ranches spread, wolves became enemy number one, and by the 1970s the subspecies was nearly extinct. But after the Endangered Species Act was passed, the U.S. embarked on an ambitious plan to save the iconic predators. We’ll meet the Texas trapper who switched from killing wolves to catching them to breed. And we’ll follow a team of biologists into the Gila Wilderness to introduce captive-born wolf pups into the wild. For more information on this episode, visit natgeo.com/overheard. Want more? Check out Peter Gwin's feature article on the Gila wilderness. Thinking of visiting the Gila yourself? We've put together a travel guide for you. Also Explore In 2021, a Mexican wolf named Mr. Goodbar crossed the border from Mexico into the United States, raising questions about how the border wall will affect animal migration. The Gila wilderness is also famous for one of the only venomous lizards in the world, the Gila monster. But climate change and human activity is threatening this charismatic reptile. Learn more about your ad choices. Visit megaphone.fm/adchoices