Green anaconda

The green anaconda (Eunectes murinus), also called the common anaconda, common water boa, akayima, or sucuri, is a boa species found in South America. It is one of the longest and heaviest snakes alive today. Unlike some snakes, the green anaconda does not have venom. Instead, it catches its prey by wrapping around it very tightly, which is called constricting.

Green anacondas live in tropical rainforests and like to stay in shallow, slow-moving waters such as streams, rivers, and flooded grasslands. Though they spend most of their time in water, they can also be found on land among thick plants.

In the wild, green anacondas usually live about 10 years. However, some of them live longer when they are cared for in special animal homes called captivity. These amazing snakes are fascinating because of their size and unique way of catching their food.

Taxonomy

In 1758, Carl Linnaeus described a new kind of snake in his book called Systema Naturae. He named it Boa murina, which means "snake that waits for mice." Early scientists thought it looked reddish-brown with rounded spots. Later, in 1830, another scientist named Johann Georg Wagler created a new group for this snake and called it Eunectes. Because of the way names work in science, the name changed slightly to Eunectes murinus.

People have called this snake many names over time, like green anaconda, common anaconda, and water boa. In some places, it’s been known as akayima, meaning "The Great Snake." Some scientists have suggested naming parts of this snake group separately, but they are all still considered the same kind of snake, Eunectes murinus.

Description

The green anaconda is one of the heaviest and longest snakes in the world, reaching up to about 6 meters (20 feet) long. Female anacondas are usually larger than males, often growing up to about 4.6 meters (15 feet), while males average around 3 meters (10 feet). These snakes can weigh between 30 to 80 kilograms (66 to 176 pounds), though some very large ones may weigh more.

Green anacondas live in South America and are found in places like Guyana and São Paulo. They have a greenish color with black spots and have a narrow head with special eyes that let them see while swimming. Their jaws can stretch wide to swallow large prey, and they can breathe while swallowing because of a special windpipe in their mouths. After eating, they take many days to digest their food and move slowly during this time.

Distribution and habitat

The green anaconda lives in South America east of the Andes, in countries such as Colombia, Venezuela, the Guianas, Ecuador, Peru, Bolivia, Brazil, and Trinidad, and as far south as northern Paraguay.

In April 2021, green anacondas were added to Florida's list of prohibited nonnative species. As of August 2023, eleven green anacondas have been seen in the wild in Florida, including one young anaconda found in the Florida Everglades. These anacondas have been seen from Gainesville to Homestead, Florida, a distance of over 350 miles (560 km). Florida is the only state in the continental United States with habitat that could support these snakes.

Anacondas live in swamps, marshes, lagoons, and slow-moving streams and rivers, mainly in the tropical rainforests and seasonally flooded savannas of the Amazon and Orinoco basins. They are slow on land but quiet and smooth in the water. Their eyes and nasal openings are on top of their heads, allowing them to stay almost completely hidden underwater while waiting for prey.

Behavior

Anacondas are mostly active at night and like to stay in water. They can float underwater and swim quickly. Their eyes and nose are on the top of their heads, which helps them breathe and watch for food while most of their body stays hidden underwater. When an animal passes by or stops to drink, the anaconda will strike quickly. It wraps around the animal with its body, squeezing it until the animal can no longer breathe.

Anacondas eat many different kinds of animals, such as fish, birds, mammals, and other reptiles. Bigger anacondas might sometimes eat larger animals like deer or jaguars, but this does not happen often. Younger anacondas start with smaller food like birds and baby caimans. As they grow, they eat bigger meals. Sometimes they may even eat other anacondas. After eating a big meal, anacondas can go a long time without eating again because they do not need to eat as often.

Longevity

Green anacondas in the wild live for about 10 years. When kept in special care places, they can live much longer — up to 30 years or more. The oldest known green anaconda in a care place was 37 years and 317 days old, as shown in the Guinness Book of World Records in 2023. This amazing snake lived at Montecasino Bird & Reptile Park in Johannesburg, South Africa.

In popular culture

Anacondas are often shown in scary stories and movies. In these stories, they are shown as very big, fast, and able to eat grown-ups. Sometimes, these traits are also given to other snakes like the Burmese python and the reticulated python, but most often they are shown as green anacondas. However, there is no proof that green anacondas ever eat humans. This may be because the biggest anacondas live far away in the Amazon jungle, away from people, unlike some pythons in Asia.