YELLOW-AND-BLUE POISON DART FROG
Blue or black back with 2 broad yellow stripes connected by yellow crossbands. Arms and legs are blue. As their name implies, these frogs have a toxin (poison). Their bright coloration acts as a warning to other animals. And in fact, fewer poison arrow frogs are eaten during the day when predators can see them easier. Not many predators can withstand the poison of a poison arrow frog. The frog's poison is secreted through the skin and even a lick can sometimes prove fatal. Poison arrow frogs have about 200 micrograms of poison in their systems. It would take only 2 micrograms to kill a human. The skin toxins are derived from the frog’s diet. This may be why the frogs lose toxicity when in captivity.