Where are the frogs? Image:Bufo periglenes1.jpg| EXTINCT: The Golden Toad of Monteverde, Costa Rica was among the first casualties of amphibian declines . Formerly abundant, it was last seen in 1989. The Global Amphibian Assessment, an international convention of amphibian biologists, indicated in 2004 that over a third of the world's amphibian species are threatened, making them the most threatened group of animals on the planet. More than 120 species have likely become extinct since the 1980s, and around two-thirds of the South American harlequin frog species vanished in the 1980s and 1990s. The decline of amphibians in protected habitats has puzzled conservation biologists for nearly 20 years.
Where are the frogs? EXTINCT: The Golden Toad of Monteverde, Costa Rica was among the first casualties of . Formerly abundant, it was last seen in 1989. The Global Amphibian Assessment, an international convention of amphibian biologists, indicated in 2004 that over a third of the world's amphibian species are threatened, making them the most threatened group of animals on the planet. More than 120 species have likely become extinct since the 1980s, and around two-thirds of the South American harlequin frog species vanished in the 1980s and 1990s. The decline of amphibians in protected habitats has puzzled conservation biologists for nearly 20 years.
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Image:Bufo periglenes1.jpg|
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amphibian declines