Poison Dart Frog


The poison dart frog (pictured: Dendrobates azureus) lives in Central and South American rainforests, growing to between 1.5 and 6 cm in length. Indigenous people used the frog's toxic secretions to poison the tips of blow-darts, giving the frog its name. The secretions, which are being studied in medical trials, might also be used as muscle relaxants, appetite suppressants, and heart stimulants. Their bright colors form `aposematic patterns', which serve to ward off predators by suggesting an unpalatable toxicity. There are around 175 closely related species of poison dart frog which vary in size and coloration. The most colorful are the 5 within the dendrobates genus.

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