Poison dart frogs rely on their bright coloration to warn off predators. Any who don’t get the message are subjected to their deadly poison. Bright Skin (Ex): A poison dart frog’s brightly colored skin is meant to warn predators of its poison, potentially helping it to avoid being eaten. A creature that spots a poison dart frog is entitled to a DC 5 Wisdom check to realize that the frog is poisonous. Animals and most other creatures that succeed this check will not bite or attempt to eat a poison dart frog.