Summary News from Nature - Already suffering from a decade of drought, Colorado's forests are under attack by the mountain pine beetle. The epidemic is staggering, but conservationists hope the unstoppable infestation will eventually lead to a healthier forest less susceptible to pine beetles. Stories from the Wild - Over the past two decades the Magellanic penguin population in Argentina has dropped by 22 percent. To discover what is threatening the population, National Geographic grantee Dee Boersma uses state-of-the-art technology to count the penguins and monitor their movements. Field Reports - In Australia, a highly toxic, alien invader is attacking the protected habitat of Moreton Bay's endangered green sea turtles. Researchers deploy National Geographic's Crittercam® to learn how the turtles are coping as they search for ways to protect the turtles from the invading slime. Adventure and Exploration - Florida's warm weather and lush landscape offer an attractive habitat to a number of invasive species that are wreaking havoc on local ecosystems. Wild Chronicles investigates how these non-native species, including green iguanas, lionfish and a plant called hydrilla, first arrived.

• Documentary