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Poison dart frogs can be found in the tropical rainforests of Central and South America. Unlike many other amphibians, poison dart frogs are diurnal. Most species are terrestrial but a few are arboreal.oison dart frogs can be found in the tropical rainforests of Central and South America. Unlike many other amphibians, poison dart frogs are diurnal. Most species are terrestrial but a few are arboreal.
Harlequin frogs (Atelopus varius) Harlequin frogs are usually black or brown with spots or streaks that can be a combination of yellow, orange, red, blue, or green. They live in the moist, tropical forests in Central and southwestern South America. About two-thirds of over 110 species of these brightly-colored frogs have vanished since the 1980s.