The primarily nocturnal anaconda species tend to spend most of its life in or around water. Rivas, J.A., Thorbjarnarson, J.B., Munoz, M.C., and Owens, R.Y. Eunectes murinus is found in South America east of the Andes, in countries including Colombia, Venezuela, the Guianas, Ecuador, Peru, Bolivia, Brazil, the island of Trinidad, and as far south as northern Paraguay. thesis, University of Tennessee, Knoxville. Life history of the green anaconda ( Eunectes murinus) with emphasis on its reproductive biology. Rivas, J.A., 1998, Predatory attacks of green anacondas (Eunectes murinus) on adult human beings: Herpetological Natural History 6:157-159. Iguana iguana (Green Iguana): Juvenile predation. Geological Survey Open-File Report 2009–1202, 302 p. Giant constrictors: biological and management profiles and an establishment risk assessment for nine large species of pythons, anacondas, and the boa constrictor: U.S. A female anaconda can give birth to as many as a 82 young, though typically the size of the litter ranges from 28 to 42 (Reed and Rodda, 2009).Īreste, M. The gestation period for the Green Anaconda is 6 to 10 months. Often the snakes cluster in a breeding ball which may consist of up to 13 males coiled around one female. The female is thought to lay down a pheromone trail, which attracts the male. Courtship often extends over several months and the mating period typically is from April to May. The Green Anaconda reproduces sexually and has internal fertilization. Predators of small anacondas include Crab-eating Foxes, tegu lizards, Crested Caracaras, caimans, and larger Green Anacondas (Rivas et al. Neonates and juveniles are particularly prone to predation, and seem to suffer high mortality within their first year. There are few records of attacks on humans, and no well-documented deaths (Rivas, 1998 Reed and Rodda, 2009).Īnacondas are not immune from predators. After a meal, an anaconda may not eat for weeks or months (Reed and Rodda, 2009). This species has a slow-acting digestive system it often takes days or weeks to digest food. They are known to consume large prey such as peccaries, capybaras, tapirs, deer, and sheep. The Green Anaconda swallows its prey whole, even prey much larger than the diameter of their mouths. Small individuals may climb trees to raid bird nests. The list of potential prey items of an anaconda is extensive and varied, and consists of birds, amphibians, reptiles, mammals, and fish.
It immobilizes and kills its prey by using its jaws to hold on the prey while coiling its body around the animal and constricting until it dies from suffocation or other crushing injuries. This species is a constrictor, nonvenomous, and an ambush predator. Because of its aquatic nature, it is able to escape extremes in temperature variation. It often is found in seasonally flooded areas (Reed and Rodda, 2009). It can be found in deep, shallow, turbid, and clear waters, and lacustrine and riverine habitats. Ecology: The Green Anaconda is an aquatic snake usually found submerged under the water or near the water’s edge.
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