Green Anaconda (Eunectes murinus) in the wild — Catch'Um species field guide

Green Anaconda (Eunectes murinus) wildlife photograph

Overview

Green anacondas are among the heaviest snakes on Earth, built for life in water with eyes and nostrils set high on the head. They ambush capybaras, caimans, and deer at the water's edge, coiling with crushing force rather than using venom.

Myths inflate their size, but the real animal needs no exaggeration — a legendary Brazil card for Pantanal and Amazon collectors.

Scientific nameEunectes murinus
Length4–6 m typical large adults
Weight30–70+ kg
LifespanAround 10–30 years in the wild
DietAmbush predators of…
ConservationLeast Concern
RegionWetlands & Rivers

Habitat

Swamps
Slow rivers
Flooded forest
Wetlands

Green anacondas inhabit swamps, slow rivers, flooded forest, and wetlands across northern and central South America, with the Pantanal among the best-known viewing regions in Brazil.

Countries found

Green Anaconda in Brazil

Field notes

Field scale for the Green Anaconda: length around 4-6 m typical large adults; weight 30-70+ kg. Typical lifespan: Around 10-30 years in the wild.

When you are scanning habitat, prioritise swamps, slow rivers, flooded forest, and wetlands. Those settings are where a clean look and a usable photo are most likely.

Quick ID anchor: Massive olive-green snake with oval black blotches along the body. Confirm with behaviour and habitat before you log the discovery.

Where to see one

Brazil
In Brazil, strong options include Pantanal and Amazon Rainforest. The world's largest tropical wetland, with capybaras, jaguars, hyacinth macaws, and giant otters in open savanna.
Open the Brazil spotting guide for every park note tied to the green anaconda.
Spotting guide for Green Anaconda in Brazil

Diet

Ambush predators of large vertebrates at water margins — capybara, caiman, deer, birds, and fish.

Kill by constriction, then swallow prey whole.

Behaviour

Mostly aquatic and often solitary; bask on banks or float with only the head visible.

Females give birth to dozens of live young in the water.

How to identify

Massive olive-green snake with oval black blotches along the body.

Heavy body, dark stripe through the eye, and a head barely wider than the neck.

Interesting facts

01
Green anacondas are among the world's heaviest snakes.
02
They are non-venomous constrictors.
03
Eyes and nostrils sit on top of the head for lurking at the surface.
04
They give birth to live young rather than laying eggs.
05
Diet includes capybaras, caimans, birds, and deer.
06
Despite legends, reliably measured lengths rarely top about 6–7 metres.

Conservation status

LC: Least Concern

Green anacondas are Least Concern but face local pressure from habitat drainage and persecution. Large wetlands such as the Pantanal remain crucial strongholds.

Sources: IUCN Red List