The anaconda is able to consume large preys as Capybara ( Hydrochoerus hydrochaeris) which is one of his favorite victims and juveniles unique species as: Brazilian tapir ( Tapirus terrestris), Red brocket deer ( Mazama americana) Gray or brown brocket deer ( Mazama gouazoubira)
When swallowing, the maxilla and mandible, which are fasten to the skull by ligaments, they manage to separate to accommodate to the size of the prey. It has four rows of teeth, one regular and one on the palate used to move the food down her throat. Teeth are like needles sharp and directed toward the interior of the mouth, they serve to retain the prey and allow not escaping. The anaconda, like all snakes can not chew food, and instead of, swallow them integer. With its immense constrictive forcé, submitted its prey in just over 10 seconds, the death of his victim is by asphyxia. Usually hunt animals that come to drink, it traps them with jaws and simultaneously wraps itself around its body to suffocate them. The anaconda used to travel on the rivers, but prefer the still waters such as ponds or aguajales where most of the time is immersed to stalk their prey the position of the nostrils allows it to submerge the most of the body as a camouflage. The anaconda choose the camouflage found on the banks of streams as well as the trunks and beaches to sunbathe or relax. The powerful muscles of the anaconda makes it a skillful swimmer, the green anaconda can travel short distances underwater or on the surface very quickly, where it is capable of reaching a speed of 6 meters per second, but on the ground their movements are slow and heavy. In that environs, this anaconda presents spurs which are remnants of locomotives atrophied limbs. There is a kind of anaconda which the only part of the entire body is not covered by scales, these ones inhabit in the Caudal region, near the cloaca zone. The snout is covered for six thickened scales, three on each side, which are the most distinctive trait that separates the genus Eunectes species from the closely related Boa. The olfactory receptors are found on the tongue, like all the snakes. The eyes of the anaconda are small and have the typical vertically elliptical pupil of the poisonous species and the boids, the vision of the anaconda is not very acute. The nostrils and eyes are in an elevated position, to make breathing and perception easier during the long periods that the anaconda spend submerged. The head is narrow and does not have a distinctive neck.
The body is broad and muscular, adapted to kill their prey by constriction. The belly is more clearly, and the end of the tail shows yellow and black designs that are unique by each one. The anaconda is dark green in color with oval black spots and ocher on the flanks. The females are larger than the males, this is the most marked sexual dimorphism case into the order of these reptiles are grouped ( Squamata). The anaconda is the biggest snake of America and can exceed the 8 meters long and weight more than 200 kg. Also they can be founded in countries as: Brasil, Bolivia, Colombia, Guyana, Peru, Paraguay, Venezuela and Trinidad Island. The anaconda is endemic from South America inhabits the basins of the Orinoco and the Amazon rivers. In length, it competes only with the Southeast Asian reticulated python ( Python reticulatus). The green anaconda (Eunectes murinus), its a constrictor snake of the boas family, endemic from the tropical rivers of South America, of all the snakes this is which has the highest weigh and perhaps the largest known snake.