Snake Identifier
Bolivian Anaconda (Eunectes beniensis)
Eunectes beniensis 146229965 by Don Johnston, via Wikimedia Commons, licensed under CC0
Boas

Bolivian Anaconda

Eunectes beniensis

A recently described anaconda species from the Bolivian lowlands, considered by some to be a possible hybrid population.

Venomous?
Non-venomous
Adult length
2-3.5 m (6.5-11.5 ft)
Range
Bolivian lowlands (Beni Department)

Found a snake like this?

Identify any snake from a photo, free.

Identify a snake

Overview

The Bolivian Anaconda was described in the early 2000s from the Beni region of Bolivia, and its status as a fully distinct species remains debated, with some researchers suggesting it may represent a hybrid zone between the Green and Yellow Anacondas.

Regardless of its precise taxonomic status, populations in this region show a combination of features distinguishing them from neighboring anaconda species.

How to identify it

  • Intermediate size and coloration between Green and Yellow Anacondas
  • Olive to yellowish-brown base color with dark blotches
  • Stout, muscular body with eyes and nostrils set high on the head
  • Smooth scales typical of anacondas
  • Identification often relies on locality within the Beni lowlands given overlapping features with related species

Habitat & range

Found in the seasonally flooded savannas and wetlands of the Beni Department in the Bolivian lowlands, an area of extensive marshes and rivers.

Behavior, diet & reproduction

Highly aquatic, ambushing fish, birds, and mammals near water. Active largely at dusk and night though may bask by day. Reproduces via live birth typical of anacondas.

Frequently asked questions

Is the Bolivian Anaconda venomous?

No, it is a non-venomous constrictor.

Is it a fully distinct species?

Its status is debated; some researchers consider it a valid species while others suggest it may reflect a hybrid zone between Green and Yellow Anacondas.

Where is it found?

The Beni lowlands of Bolivia, in seasonally flooded savanna and wetland habitat.

How large does it get?

Typically 2-3.5 m (6.5-11.5 ft), intermediate among anaconda species.