Some harlequin frogs have lost their poison—and their ability to defend themselves. Scientists are on the case.

The frogs belong to the Atelopus group from Central and South America.

Panama's beloved golden frog vanished from the wild nearly two decades ago, wiped out by a fungal disease that still lurks in the very streams scientists now want to restore it to. A new experiment ...

A fungus that is devastating populations of frogs and toads around the world may be vulnerable to a virus that can infect it, and that could be genetically engineered to kill it The Panamanian golden ...

Biologists argue that more research needs to be done on the colorful yet poisonous harlequin toads of Central and South America, not only because their ecology is poorly known, but because their ...

Once common along highland streams in western Costa Rica and Panama, the variable harlequin frog, Atelopus varius, is endangered throughout its range, decimated by a disease caused by the amphibian ...

Add Yahoo as a preferred source to see more of our stories on Google. The Panamanian golden frog (Atelopus zeteki) has been extinct in the wild since 2009, thanks in part to a deadly skin disease. Now ...

Deep in the Panamanian jungle, conservation biologist Brian Gratwicke and his team hunted a radio transmitter signal that led them to a ferocious-looking whip scorpion in the middle of a meal. Some ...