Forty percent of all the frogs in the world are in danger of extinction, according to the Smithsonian Institution. Pollution, pesticides, climate change and now a fungus are taking a toll on this diverse group of amphibians. Until recently, the central rain forest of Panama was rich in frog species. Smithsonian conservationist Brian Gratwicke is directing a campaign to save and reproduce in captivity some of the world's most endangered frogs. VOA producer Zulima Palacio visited Gratwicke in the jungle to learn why the fate of frogs is important.