The poison dart frog is one of the most interesting, and most dangerous, species in the Amazon. The frog's skin has a dangerous poison that can hurt other animals when they try to eat it. While many other frog species use their brown or green skin to hide in the forest, the poison dart frog uses its bright colors to tell animals: "i'm dangerous! Don't eat me!" The poison dart frog is an animal in trouble because people are cutting down the trees it lives in.