There are four species of anaconda today: Green anacondas (Eunectes murinus), yellow anacondas (E. notaeus), Bolivian anaconda (E. beniensis), and the dark-spotted anaconda (E. deschauenseei). The biggest and best known are the green anacondas, which live live in wetlands and river basins through tropical South America, including parts of Brazil, Colombia, Venezuela, Guyana, Surinam, Bolivia, Peru, and Ecuador. Green anacondas will eat almost anything, including birds and their eggs, other reptiles and amphibians, fish, and mammals. Green anacondas won’t say no to snacking on other big reptiles. Like most snakes, anacondas have four rows of teeth on their upper jaws.