Green Anacondaオオアナコンダ

Eunectes murinusLC— Least Concern

The green anaconda is the world's heaviest snake, a non-venomous constrictor native to the Amazon basin and other river systems of northern South America. It preys on fish, birds, and mammals of almost any size, with large individuals known to take down caimans and even jaguars, and gives live birth to litters of 20 to 80 young. It is currently assessed as Least Concern, though a population from the Orinoco region was recently classified as a distinct species in 2024.

Green Anaconda (reference photo)
Photo: Photo by David J. Stang / CC BY-SA 4.0 / Source / cropped

Species Data

Classification
Squamata / Boidae Source
Distribution
Found in South America east of the Andes, including Colombia, Venezuela, the Guianas, Ecuador, Peru, Bolivia, Brazil, Trinidad, and northern Paraguay. Source

Did You Know?

  • It is the world's heaviest living snake, a non-venomous constrictor documented preying on large animals such as caimans and even jaguars. Source
  • It is ovoviviparous, giving birth to 20–80 live young at once, and females have been documented reproducing via facultative parthenogenesis when no males are available. Source

Where to See This Species

2 facilities · 0 individuals

札幌市円山動物園 (Sapporoshimaruyama Doubutsuen)HokkaidoOpened in 1951

札幌市円山動物園のWikipedia記事に飼育種として記載 Source

Higashiyama Zoo and Botanical GardensAichiOpened in 1937

名古屋市東山動物園のWikipedia記事に飼育種として記載 Source

Conservation Story

Conservation Status

IUCNでLC（低懸念）。湿地の改変は地域個体群への脅威です。

Habitat

南アメリカの熱帯湿地、河川、沼沢。

Threats

  • 湿地開発
  • 水質汚染
  • 人による捕殺

Conservation & Breeding Efforts

  • 湿地保全
  • 生息状況の調査
  • 環境教育

Sources

ja.wikipedia.org

Support Conservation

A visit is a small, positive way to support the daily lives of the animals you care about.

Visit
A visit itself helps support the facility.
Animal Supporter Programs & Giving
Find ways to support the facility through its official website.
Furusato Nozei
Municipally run facilities may share official guidance for this Japanese hometown-tax program.

FAQ

How big can a green anaconda get?
It can reach lengths of over 6 m and is considered the heaviest snake species in the world, with large females weighing 30–80 kg or more. Source
Does the green anaconda lay eggs?
No—it is ovoviviparous, giving birth to 20 to 80 live young at a time rather than laying eggs. Source

Source: ja.wikipedia.org en.wikipedia.org