Not everything beautiful is harmless : The fairy tale goes that a pretty young woman kisses a frog and he turns into a handsome prince. The two live happily ever after. If one were to kiss one of the following frogs they might not live to tell the result of it! Most poisonous on Earth : Most frogs produce skin toxins, but the dart poison frogs from Central and South America are the most powerful of all. The golden poison frog, called terribilis (the terrible), is so toxic that even touching it can be dangerous. A single terribilis contains enough poison to kill 20,000 mice or 10 people. It is probably the most poisonous animal on earth.There are over 300 species of poison dart frogs and they come in a large array of beautiful colors. It is their brilliant colors that enable them to travel the rain forests with out fear because the bright colors are an indication of the fact that they are toxic and not worth eating. Poison used for hunting : The blue poison dart frog is a poor swimmer because his toes lack the webbing found in other frog's feet. You will find him hiding among debris and boulders near the streams of Columbia and South America.