Green Anaconda

Common Name:
Green Anaconda
Scientific Name:
Eunectes murinus
Type:
Reptiles
Diet:
Carnivore
Group Name:
Bed, knot
Average Life Span In The Wild:
10 years
Size:
20 to 30 feet
Weight:
Up to 550 pounds
IUCN Red List Status:
Not evaluated
Current Population Trend:
Unknown

A member of the boa family, South America’s green anaconda is, pound for pound, the largest snake in the world. Its cousin, the reticulated python, can reach slightly greater lengths, but the enormous girth of the anaconda makes it almost twice as heavy.

Massive Size

Green anacondas can grow to more than 29 feet, weigh more than 550 pounds, and measure more than 12 inches in diameter. Females are significantly larger than males. Other anaconda species, all from South America and all smaller than the green anaconda, are the yellow, dark-spotted, and Bolivian varieties.

On Land and in Water

Anacondas live in swamps, marshes, and slow-moving streams, mainly in the tropical rain forests of the Amazon and Orinoco basins. They are cumbersome on land, but stealthy and sleek in the water. Their eyes and nasal openings are on top of their heads, allowing them to lay in wait for prey while remaining nearly completely submerged.

Diet and Hunting

They reach their monumental size on a diet of wild pigs, deer, birds, turtles, capybara, caimans, and even jaguars. Anacondas are nonvenomous constrictors, coiling their muscular bodies around captured prey and squeezing until the animal asphyxiates. Jaws attached by stretchy ligaments allow them to swallow their prey whole, no matter the size, and they can go weeks or months without food after a big meal.

Reproduction

Female anacondas retain their eggs and give birth to two to three dozen live young. Baby snakes are about 2 feet long when they are born and are almost immediately able to swim and hunt. Their lifespan in the wild is about ten years.

This photo was submitted to Your Shot, our photo community on Instagram. Follow us on Instagram at @natgeoyourshot or visit us at natgeo.com/yourshot for the latest submissions and news about the community.
This photo was submitted to Your Shot, our photo community on Instagram. Follow us on Instagram at @natgeoyourshot or visit us at natgeo.com/yourshot for the latest submissions and news about the community.
Photograph by John Tamisiea, National Geographic Your Shot

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