Blue Poison Dart Frogs
Blue poison dart frogs are found in the tropical forests that range from Costa Rica to Brazil. These amphibians are extremely toxic and vividly colored to fend off predators. Their high toxicity levels are thought to come from plant poisons that are absorbed by their prey. Blue poison dart frogs feed on insects such as ants, termites, and beetles.
Electric Eel
Electric eels are best known for the electric shock that they create to ward off predators and stun their prey. These fish are able to generate such a powerful shock because their organs contain "about 6,000 specialized cells called electrocytes that store power like tiny batteries". Electric eels can be found "in the murky streams and ponds of the Amazon and Orinoco basins of South America". Electric eels must swim to the surface of the water regularly for they are air-breathers. These marine animals also "have poor eyesight, but can emit a low-level charge, less than 10 volts, which they use like radar to navigate and locate prey". Electric eels feed on fish, amphibians, and even birds and small mammals.