Nature: Venom

"Some of the world's loveliest creatures are also the most lethal creatures. Why? Because they produce and use venom - an injected toxin - to capture prey and deter predators. Many people think that only snakes and spiders are venomous, but a variety of animals, both from land and sea, use venom." -- from the website. <http://www.calacademy.org/exhibits/venoms/>