Black Caiman - The Black Caiman is the largest member of the caimans, but does not belong to the same genus "caiman". It can grow up to 20 feet in length and weigh over 1000 lbs. It lives in the rivers and wetlands of the Amazon.
Green Anaconda - The Green Anaconda is the largest snake in the world. It inhabits the rainforests of Brazil and South America, where it feeds on caimans, large rodents and pigs.
Gaboon Viper - The Gaboon Viper has extremely high amounts of venom. They have two distinguishing "horns" on their snouts, and blend well into forest floors.
Boa Constrictor - The Boa is the most famous of the constrictors, even though it is not the largest or longest. It can still pose a threat to humans, but feeds mostly on smaller animals and eggs.
Reticulated Python - The Reticulated Python lives in the rainforests of Southeast Asia and Indonesia. It can grow extremely long, and has been measured at over 25 feet. It has been known to kill humans from time to time, but mainly hunts deer and pigs.