Green anaconda (Eunectes murinus)

The famous anaconda is a constricting snake endemic to the Amazonian rivers, which makes up the family of boas. Although it is recognized as the heaviest species of snake, since it can weigh more than 220 kg, there are controversies about whether or not it is the largest. This is because the so-called reticulated python (Python reticulatus) is usually a few centimeters longer than anacondas, although its body weight is much lower.

In spite of its bad reputation conquered in great part by the films that took their name, the anacondas hardly attack the human beings, since we are not part of their trophic chain. That is, anacondas do not attack humans to feed themselves. The rare attacks of anaconda to people are defensive, when the animal feels threatened or attacked in some way. Actually, snakes in general have a rather elusive rather than aggressive character. If they can escape or hide to save energy and avoid a confrontation, surely they will.