They are brightly colored to warn predators of the danger.
As the most poisonous animal on earth, the Golden Poison Dart Frog is incredibly dangerous. The amount of poison in one full-grown frog is enough to kill ten grown adults. They are brightly colored to warn predators of the danger. Scientists are unsure of the source of the poison, but it could come from a build-up of poison from plants that they get from their prey. This is supported by the fact that the frogs raised in captivity do not possess any poison and are not eating prey from their native habitat.