Eunectes notaeus is a non-venomous boa species found in South America. No subspecies are currently recognized. Anaconda in the wild spend most of their time in rivers hunting for their food. They are solitary creatures that are thought to be somewhat shy and not many of them are easily seen. Adults are not as large as the green anaconda, E. murinus, but nevertheless grow to an average of 305-366 cm (10-12 feet) in length. The maximum size is almost certainly larger. Females are larger than males. The color pattern consists of a yellow, golden-tan or greenish-yellow ground color overlaid with a series of black or dark brown saddles, blotches, spots and streaks.