National Parks Traveler: Wildlife Extinctions, Recoveries, And Future

We're in the middle of a world-wide extinction crisis. Here in the United States, the U.S. Fish and Wildlife Service just announced that nearly two dozen species, from the Ivory-billed woodpecker to two freshwater fish species, are extinct. How are wildlife in the parks doing? To explore that and other questions surrounding wildlife, we're joined by Dr. Joel Berger, a senior scientist with the Wildlife Conservation Society as well as the Barbara Cox Anthony University Chair in Wildlife Conservation at Colorado State University.