Undated photo issued by the International Union for Conservation of Nature, shows the Chiriqui Harlequin Frog, endemic to Costa Rica and Panama, which is now extinct, according to an IUCN report ...

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 ...

Smithsonian Scientists Release Frogs Wearing Mini Radio Transmitters Into Panamanian Wilderness First Release Trial To Help Pave the Way for Reintroduction Programs for Critically Endangered Frogs ...

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