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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).
Tribes in the frogs' native habitats used the frog poison on their arrows. The frogs' vivid colors warn potential predators they aren't safe to eat. As adults, poison dart frogs are carnivores, yet many are omnivores as tadpoles, says National Aquarium Curator Ken Howell on the organization's website. Native to Central and South American rainforests and to some Hawaiian islands, poison dart frogs hunt spiders and small insects such as termites and ants.