The green anaconda (Eunectes murinus), also known as the giant Emerald anaconda, common anaconda, common water boa or sucuri, is a boa species found in South America. It is the heaviest and one of the longest known extant snake species. Like all boas, it is a non-venomous constrictor. The green anaconda is the world's heaviest and one of the world's longest snakes, reaching a length of up to 9.3 m (30 ft 6 in) long. More typical mature specimens reportedly can range up to 5 m (16 ft 5 in), with adult females, with a mean length of about 4.6 m (15 ft 1 in), being generally much larger than the males, which average around 3 m (9 ft 10 in). Weights are less well studied, though reportedly range from 30 to 70 kg (66 to 154 lb) in a typical adult. It is the largest snake native to the Americas. Although it is slightly shorter than the reticulated python, it is far bulkier; the bulk of a 4.5-metre (14 ft 9 in) green anaconda is comparable to that of a 7.4-metre (24 ft 3 in) reticulated python. Reports of anacondas 11–12 m (35–40 ft) or even longer also exist, but such claims must be regarded with caution, as no specimens of such lengths have ever been deposited in a museum and hard evidence is lacking. A US$50,000 cash reward is on offer for anyone who can catch an anaconda 30 ft (9.14 m) or longer. The longest and heaviest verified specimen encountered by Dr. Jesús Antonio Rivas, who had examined more than a thousand anacondas, was a female 9.3 m (30 ft 6 in) long and weighing 250 kg (551 lb 2 oz). (Source: Wikipedia.org, CC BY-SA)