Found from Mexico to Paraguay, this is one of the most well-known snakes, and has been popular in zoos for well over a century. It is also common in private collections. While it has a reputation as a giant, it actually rarely reaches 14 feet, and has never been documented to reach 20 feet. In contrast to the much larger Anaconda, it is not dependent on water in its environment, though it swims quite well. A nocturnal animal, it is often motionless during zoo visiting hours.
This beautiful snake is found in the rainforests across a large area of South America. Unlike its more famous relatives, the Boa constrictor and the Anaconda, it only reaches a length of about six feet. It has the longest fangs in proportion to its size of any living snake. Females give birth to as many as 20 young, which do not attain their bright green color until they are around nine months old. Until then, they are orange or dark red. In recent years it has been regularly bred in captivity.
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.