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  3. Green Anaconda

One of the 2 anacondas on WAnimals

Green Anaconda (Eunectes murinus)

Reptiles · Squamata · Boidae

Green Anaconda

Eunectes murinus

Least Concern

The species is abundant and widely distributed; it faces no significant short-term risk.

Spotted something wrong?

The green anaconda is the heaviest snake in the world: females exceed five metres and can pass a hundred kilos, far more than the reticulated python, which is longer but much more slender. It lives in the wetlands of South America, hunts from ambush in the water and kills by constriction. It is viviparous and shows extreme sexual dimorphism.

Weight

30 kg – 150 kg

Size

3 m – 6 m

Life expectancy

30 years

Diet

Carnivore

Feeds mainly on other animals.

Activity

Nocturnal

Active mainly at night.

Social structure

Solitary

Lives and hunts alone, joining others only to breed.

Sighting difficulty

Easy

RainforestFreshwater
12countries12parks11same family1natural phenomena1featured routes

AI-generated images: illustrations, not photographs.

Fun facts

  • It is the heaviest snake on the planet: although the reticulated python is longer, a large anaconda can weigh three times as much, and its body reaches the girth of a human torso.
  • Its dimorphism is among the most extreme of any vertebrate: females can weigh five times as much as males, and during breeding as many as a dozen males form a writhing ball around a single female for weeks.
  • It is virtually aquatic: its weight makes it clumsy on land, but in the water it moves quickly and can stay submerged for long spells with only its eyes and nostrils showing.

Life cycle and biology

Skeleton type
Vertebrate - internal bony skeleton (reptile)
Habitat and environment
Slow rivers, marshes, swamps and floodplains of Amazonia, the Orinoco and the Guianas
Sexual maturity
2.5 years
Gestation / incubation
7 months of gestation
Litter / clutch size
30 live young

Sources consulted: https://www.iucnredlist.org/ | https://animaldiversity.org/ | https://es.wikipedia.org/

Where to find it

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The pins mark the parks where its presence is documented.

Where to see it

Parks and dive sites where this species has been documented — showing 10 of 12.

Related species

Other species in the catalogue with the most in common with Green Anaconda — same habitat, park, country, tags or family.

Same taxonomic family
Same taxonomic family
Same taxonomic family
Shares a park
Shares a park
Shares a park

Keep exploring

Based on what we already know about green anaconda.

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See full glossary
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See its range on the interactive map→
ManuPeru
TambopataPeru
YasuníEcuador
AmacayacuColombia
Noel Kempff MercadoBolivia
South Suriname Nature ReserveSuriname
Bahuaja-SonenePeru
ChiribiqueteColombia
AnavilhanasBrazil
Alto PurúsPeru
See all 12 parks
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Water Opossum

Chironectes minimus

Least Concern

Greater Bulldog Bat

Noctilio leporinus

Black CaimanLeast Concern

Black Caiman

Melanosuchus niger

CountriesPeru
ParksManuPeru
TagsCarnivore
Carnivore
Nocturnal
Solitary
Reptile
Rainforest
Freshwater

South America11

North America1

Peru
Colombia
Bolivia
Brazil
Ecuador
Suriname
Argentina
Bolivia
Brazil
Colombia
Ecuador
French Guiana
Guyana
Paraguay
Peru
Suriname
Venezuela
Trinidad and Tobago