The poison dart frog is one of the many venomous species in the world, but what's different about them is that they look quite attractive to people. They come in various shapes and sizes, colours and levels of venom. "How could something so tiny be so poisonous?" you would think to yourself as you walked through the rain-forests that they live in, mainly in South America, although on some rare occasions they live in central America.They come in blue, yellow, pink and all sorts of other lovely, vibrant colours. Just don't keep them as a pet!