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Most species of poison dart frogs are small, sometimes less than 1.5 cm (0.59 in) in adult length, although a few grow up to 6 cm (2.4 in) in length. They weigh 1 oz. on average. Most poison dart frogs are brightly colored, displaying aposematic patterns to warn potential predators.oison dart frogs are endemic to humid, tropical environments of Central and South America. These frogs are generally found in tropical rainforests, including in Bolivia, Costa Rica, Brazil, Colombia, Ecuador, Venezuela, Suriname, French Guiana, Peru, Panama, Guyana, Nicaragua, and Hawaii (introduced).
Other poison dart frogs are far less toxic than the golden poison frog, and only a handful of species pose a risk to humans. Obtaining the poison for use on darts was a gruesome process, according to an account published in 1978.he brighter frogs were more toxic. Her team collected strawberry poison dart frogs from western Panama, and measured how toxic the frogs' skin chemicals were. She also measured their colours precisely, using an instrument called a spectrophotometer, and determined how easily predatory birds could detect them.