Exceeding 20 feet in length and 300 pounds in weight, this famous South American snake is by far the largest of the boas, and is the heaviest of the world’s snakes (the Reticulated python from Asia may grow slightly longer). Anacondas give birth to live young, usually 20 to 40 at a time. With their eyes near the top and end of their heads, they are adapted to an aquatic environment, and most of their prey is taken in or near water. At the DWA, they are fed rats. The largest specimen here is 14 feet long.