which green snakes are venomous
Questions About Snakes

Venomous and Non-Venomous Green Snakes (with Pictures)

There are literally hundreds of species of snakes that are green in color. Some are harmless (non-venomous), while others are highly venomous. That’s why green snake identification is so crucial.

Are there green snakes that are poisonous? Green snakes with lethal venom include the African green mamba, palm pit viper, green parrot snakes, African bush viper, boomslangs, and two-striped forest pit vipers. The only American venomous snakes that ‘sometimes’ have a greenish hue are cottonmouths and Mojave rattlesnakes.

Almost every serpentine family contains some green-colored snakes. Because of this, some green snakes have venom, and others that are harmless to humans. We will look at the species of green snakes from America, Asia, Africa, and Australia. You’ll find out how to identify green snakes.

Venomous Green Snakes in North America

The temperate climate of North America is home to many venomous snakes, some of which have a green appearance. The most common snakes that you might encounter include Mojave rattlesnakes, cottonmouths, and palm pit vipers.

Mojave Green Rattlesnake (Crotalus Scutulatus)

Mojave Green RattlesnakeThe Mojave rattlesnake is native to Southwest US and Mexico. It can be found in the deserts of California, Arizona, Nevada, Utah, New Mexico, and Texas.

In some areas, this snake is known as the “Mojave green rattlesnake” thanks to the olive-green tinge of its scales. In other areas, it can appear brown, sandy yellow or grey. It has a diamond-shaped pattern down its back, and a segmented rattle on the end of its tail.

A bite from a Mojave rattlesnake is severe. Mojaves have the most potent venom of any rattlesnake, causing serious neurotoxic symptoms such as vision and respiratory problems. Deaths from Mojave bites are rare these days, but would be much more common without antivenin.

Cottonmouth (Agkistrodon Piscivorous)

water moccasinThe cottonmouth (water moccasin), is another pit viper (belonging to the same subfamily as rattlesnakes). It is endemic to the U.S., and can be found in the southwest states. Its range extends as far east as Texas and as far north as southern Illinois.

Cottonmouths are semi-aquatic, and commonly found around bodies of water. Some cottonmouths are grey, brown or even black, whereas some have an olive-green hue. Juveniles are banded, but this pattern usually fades in adulthood.

A bite from a cottonmouth isn’t as dangerous as a rattlesnake bite, but it still requires urgent medical attention. Their venom contains cytotoxins, which destroy bodily tissues and cause internal bleeding.

Palm Pit Viper (Bothriechis spp.)

Palm Pit ViperAcross Mexico and Central America, there is a genus of snakes known as the palm pit vipers (or palm vipers). There are almost a dozen species. Many of them are bright green, which comes in handy when camouflaging themselves in trees. Some examples include:

  • The side-striped palm pit viper, found in Costa Rica and Panama
  • The Mexican palm pit viper, found in Mexico
  • The Guatemalan palm pit viper, native to Mexico, Honduras and Guatemala.

All palm vipers are venomous, and dangerous to humans. Medical reactions to bites can range from mildly serious to fatal. Like all pit vipers, palm pit vipers have heat-sensing pits near their nostrils, which they use to detect prey. They also have slit-like pupils and triangular shaped heads.

Venomous Green Snakes in South America

South America is home to numerous venomous species, many of which reside in the tropical Amazon rainforest. The green snakes among these include the two-striped forest pit viper, the green vine snake, and the green parrot snake.

Two-Striped Forest Pit Viper (Bothrops Bilineatus)

two striped Forest Pit ViperIn the Amazon rainforest, you may stumble upon the two-striped forest pit viper. It’s also sometimes referred to as the Amazonian palm viper.

It is an arboreal (tree-climbing) snake, recognized by its yellow face and pale green body. Some specimens look almost minty-blue.

It has one thin yellow stripe along each side, and is flecked with small black, tan or brown spots.

The venom of the two-striped forest pit viper commonly causes uncontrolled bleeding, swelling, bruising under the skin and vomiting blood.

Deaths are rare, although some have been reported. The two-striped forest pit viper belongs to the same genus as the infamous Fer-de-Lance, the most venomous snake in South America.

Green Vine Snake (Oxybelis Fulgidus)

green vine snakeThe green vine snake is common in the northern half of South America, as far south as Bolivia. It can also be found, somewhat less frequently, in Central America and southern Mexico.

South American vine snakes are long and thin with very pointed snouts. They are bright, grass-green in color.

Although we have categorized this as a “venomous green snake,” it’s not dangerous to humans. The green vine snake is rear-fanged and must “chew” its venom into its victims, rather than injecting it through hollow fangs.

It’s not often able to bite a human, and even if it does, its venom is not potent enough to cause any problems. The most you’d likely experience is swelling, tingling, and pain.

Green Parrot Snake (Leptophis Aahaetulla)

green parrot snakeThe green parrot snake, also known as the Lora, is native to most of Central and South America. Its range spans from southern Mexico down to Argentina.

There are ten recognized subspecies, but all look reasonably similar. They hare bright green scales, thin bodies, and huge amber eyes.

One particular subspecies, L. a. nigromarginatus, has black skin underneath its scales. Some have yellow undersides.

The Lora is another excellent example of a snake which is technically venomous, but poses no threat to humans. The International Society of Toxicology found that though its venom has components in common with highly venomous Elapid snakes, it is not very toxic to mammals.

A bite may cause swelling and numbness, but would not be a cause for concern.

Venomous Green Snakes in Africa

The tropical continent of Africa, particularly the region south of the Sahara desert, contains many highly dangerous green snakes. Among these are the green mamba, the African bush viper, and the boomslang.

Green Mamba (Dendroaspis spp.)

Green MambaPerhaps the most well-known venomous snake of Africa is the black mamba, which is grey. However, it has three close cousins that are green, and just as deadly.

They are as follows:

  • Jameson’s mamba. A pale green snake with a cream underside, native to central and western Africa. It can grow over 8 feet long.
  • Western green mamba. This snake is yellowish-green in color, and tends to be slightly shorter than Jameson’s mamba. It has a narrow geographical range, found in extreme western Africa.
  • The eastern green mamba can be found all over Africa, except for a handful of countries in the north. It is a vivid grass-green, and looks similar to the western mamba.

Like the black mamba, all species of green mamba are highly venomous and extremely dangerous. According to Naunyn-Schmiedeberg’s Archives of Pharmacology, green mamba venom contains dendrotoxins, which cause severe neuromuscular effects.

It can cause convulsions, muscle degeneration and even death.

African Bush Viper (Atheris spp.)

African bush viperThe African bush viper belongs to the same family as rattlesnakes. There are many species of African bush viper. Some are bright yellow, others are brown, yet the most striking ones are bright green.

They include the following:

  • West African bush viper. Native to extreme western Africa, it is a bright, forest green from head to tail. It has heavily keeled scales and is heavy-bodied.
  • Green bush viper. This snake can range in color from yellow, to red, to bright green. For this reason, it is sometimes known as the variable bush viper. It is found in west and central Africa, south of the Sahara desert. The green bush viper’s scales are keeled and pointed, creating a “spiky” appearance.

African bush viper venom is hemotoxic, destroying red blood cells. At least one reported human bite has resulted in death, so it is not a snake to be trifled with.

Boomslang (Dispholidus Typus)

BoomslangsBoomslangs are medium-large, growing up to 6 feet in length. They have large eyes, oval-shaped heads, and relatively thick bodies.

Adult females are often brown. However, the males have bright green scales with black edges. Boomslangs are exclusively arboreal, living in trees and hunting animals found there.

The boomslang is neither a viper nor an elapid. Unlike most other colubrids, it’s incredibly venomous. It is rear-fanged, but can open its jaw very wide and bite humans with ease. It has slow-acting hemotoxic venom, causing massive internal bleeding which may begin hours after the bite.

Venomous Green Snakes in Asia

The most snake bites and fatalities every year occur in Asia, particularly in the southeast. Though most of Asia’s venomous snakes are not green, there are two well-known groups of dangerous green snakes: Asian lanceheads and Asian vine snakes.

Asian Lancehead (Trimeresurus spp.)

Asian lanceheadsAsian lanceheads are also known as Asian palm pit vipers. There are currently 47 known species, belonging to one single genus (Trumeresurus).

Like most vipers, they have triangular shaped heads and slit pupils. Not all species of Asian lancehead are green, but many are, including:

  • The white-lipped pit viper. Found across southeast Asia, this is a deep, vivid green snake with amber eyes and a yellow-green underside. This snake has a thin white stripe separating its dorsal and ventral scales.
  • The Philippine pit viper, found in the Philippines. This snake is dark green to olive green, with small brown blotches.
  • The bamboo pit viper, found only in southern India. This snake is a pale to medium green, occasionally with brown to black spots.

Like all vipers, Asian lanceheads are venomous. Their venom is hemotoxic and dangerous to humans, though the severity of bites will vary with species.

Asian Vine Snake (Ahaetulla spp.)

Asian Vine SnakeAsian vine snakes look quite similar to the green vine snake of the Americas. They are very long and thin, with sharply pointed snouts.

However, Asian vine snakes have one curious characteristic which separates them from American vine snakes: their eyes have horizontal slit pupils, similar to the eyes of a goat.

There are nine species of Asian vine snake, most of which are green. Perhaps the best well known is the long-nosed whip snake, A. nasuta. It has an interesting defense mechanism: when threatened, it can spread its scales to reveal stark black-and-white markings underneath.

Asian vine snakes are venomous, but do not pose much threat to humans. They fangs are tiny, and their venom is not deadly to humans. It may cause nausea and feverishness, with swelling at the site of the bite.

Venomous Green Snakes in Australia

Australia has a reputation for being rife with venomous snakes, but most are brown. The Tiger snake, however, can appear green in specific regions.

Tiger Snake (Notechis scutatus)

Tiger SnakeOut of all of Australia’s venomous snakes, most are brown. Tiger snakes, named for their tiger-stripe-like banding along their bodies, are usually brown too.

However, some specimens can appear dark green, depending on where on the continent they are located.

Tiger snakes are elapids, and are some of the most venomous snakes in the world. Their venom contains neurotoxins, which affect the nervous system, and mycotoxins, which cause necrosis of the muscles.

A bite from a tiger snake is deemed a medical emergency, and should never be taken lightly. According to a study by the University of Western Australia, most tiger snakebite victims survive, if antivenin is administered quickly enough.

Which Green Snakes are Non-Venomous?

Now that you’re intimately familiar with some of the world’s most impressive venomous green snakes, we’ll focus on the less harmful species. There are many green snakes all over the world which are entirely non-venomous and harmless to humans.

Non-Venomous Green Snakes in North America

North America is home to a diverse range of nonvenomous species, most of which are colubrids. Of these, four are green in color: the rough green snake, the smooth green snake, the green water snake, and the green rat snake.

Rough Green Snake (Opheodrys aestivus)

rough green snakeThe rough green snake is common throughout the southeastern United States. It can be found as far east as central Texas, in areas with lots of vegetation.

As with most snakes which are green in color, the rough green snake is arboreal, spending most of its time in trees. Rough green snakes grow up to 3.8 feet in length.

They are slim-bodied and light, with large round eyes. They are grass-green in color, with lightly keeled (ridged) scales, and a yellowish underbelly.

Rough green snakes do not possess venom, killing their prey by constriction instead. Bites from their small hooked teeth are not particularly painful nor dangerous. Rough green snakes are remarkably docile with humans, and many people keep them as pets.

Smooth Green Snake (Opheodrys Vernalis)

smooth green snakeThe smooth green snake is a close relative of the rough green snake, and almost identical.

They differ in three ways:

  • Smooth green snakes, on average, grow less than half the length of rough green snakes (1.6 feet). At their largest, they may reach 2 feet long.
  • They have smooth scales as opposed to the keeled scales found in rough green snakes.
  • Geographical range. The smooth green snake can be found mainly in the northeastern states, from Montana to Maine. There is very little range overlap with the rough green snake, though according to the US Forest Service, a small population exists as far south as Texas.

Smooth green snakes are bright green, but can be darker as juveniles. They are non-venomous and pose no risk to humans.

Green Water Snake (Nerodia Cyclopion)

Green Water SnakeThere are many non-venomous water snakes, belonging to the genus Nerodia, across the United States. Most of them are brown, grey or black.

One, however, is a dark forest-green to olive-green: the aptly named green water snake. It can be found in the southeastern States, from Texas to Florida. Its range reaches as north as Illinois.

Like the water moccasin, the green water snake favors marshy and wet environments. The two semi-aquatic snakes can often be found in the same habitats as they feed on the same prey (fish and amphibians), and they are often mistaken for each other.

However, the green water snake is non-venomous and harmless to humans. It has a narrower head than the cottonmouth, and round pupils.

Green Rat Snake (Senticolis Triaspis)

Green Rat SnakeMost North American rat snakes, such as black rat snakes and corn snakes, belong to the genus Pantherophis. However, the green rat snake is part of a separate monotypic genus (containing only one species). It can be found throughout Central America, Mexico, and a very small region of the US (southern Arizona and southern New Mexico).

Green rat snakes are light to dark olive green in color, with a light yellow underbelly. They are long, slender snakes, with narrow heads and smooth scales. Like most colubrids, they are constrictors, and lack venom. A bite is not harmful to humans or medically significant.

Non-Venomous Green Snakes in South America

The Amazon rainforest is home to numerous non-venomous snakes which use green coloration to camouflage themselves in the trees.  The two most well-known of these are the emerald tree boa and the green anaconda.

Emerald Tree Boa (Corallus Caninus)

Emerald Tree BoaNative to the rainforests of South America, emerald tree boas live exclusively in trees. They have evolved a unique way of wrapping their coils around branches (a trait shared only with the green tree python).

Juvenile emerald tree boas are orange or red. As they grow, they lose this coloration and transform into a very vivid shade of green. They have irregular lightning-bolt shaped white patches down their bodies.

Emerald tree boas are not venomous, but they are powerful constrictors. They also have the longest front teeth of any non-venomous snake. So, while a bite may not require medical intervention, it would undoubtedly hurt and bleed.

Green Anaconda (Eunectes Murinus)

green anacondaThe green anaconda is famous for attaining unbelievable lengths. Second, only to the reticulated python, the green anaconda is the longest snake in the world.

They can reach up to 17 feet long. They are olive-green, with dark blotches along their bodies. Some specimens are lighter than others.

Native to the northern half of South America, including most of Brazil, the green anaconda particularly enjoys marshes and swampy habitats. They have been known to eat capybaras, jaguars, and even caimans (cousins of alligators).

Green anacondas are non-venomous. However, they are far from harmless to humans. They are one of the only species large enough to constrict and eat humans, which they occasionally do.

Non-Venomous Green Snakes in Africa

Africa is home to a considerable number of green snakes. The most common of these are members of the genus Philothamnus, including the green water snake and the spotted bush snake.

African Green Water Snake (Philothamnus Hoplogaster)

African green water snakeNot to be confused with the American green water snake, the African green water snake looks entirely different. It is a small, thin colubrid, reaching a maximum of 2 feet in length.

The dorsal side is emerald green in color, and the ventral side is whitish-cream. Some specimens have black banding behind the head. As their name suggests, these snakes prefer to live in wet environments such as swamps and floodplains.

Some of the green water snake’s geographical region overlaps with that of the eastern green mamba. Because of this, people commonly confuse the two. Green water snakes are nonvenomous and rarely bite humans.

Spotted Bush Snake (Philothamnus Semivariegatus)

spotted bush snakeThe spotted bush snake belongs to the same taxonomical genus as the green water snake. However, they look quite different. Spotted bush snakes are thin, with very large eyes, and can grow up to 5 feet long.

They are pale grass green to mint green in color, with two rows of black spots running down their bodies. These spots get smaller eventually fade away towards the tail.

Like their cousins, the green water snakes, spotted bush snakes are harmless constrictors. They flee from humans and are not aggressive.

Non-Venomous Green Snakes in Asia

Asia is home to one of the most well-known nonvenomous green snakes in the world: the green tree python. It is also home to a common colubrid called the greater green snake.

Greater Green Snake (Cyclophiops Major)

greater green snakeThe greater green snake is a colubrid native to Vietnam, China, Taiwan, and Laos. It is similar in appearance to the rough and smooth green snakes of America, though they are not closely related.

Greater green snakes grow up to 3 feet long. They have bright green dorsal scales and greenish-yellow bellies. They can often be found in forests and on agricultural land, where they hunt mainly insects.

Greater green snakes are non-venomous, and pose no risk to humans. They are quite timid and can rarely be provoked to bite.

Green Tree Python (Morella Viridis)

Green tree pythonGreen tree pythons can be found in New Guinea, extreme northern Australia, and Indonesia. They are very similar in appearance and behavior to emerald tree boas, despite belonging to different families of snake.

They are bright green, heavy-bodied snakes, with flecks of white scales down their body. Juveniles can be yellow or red with white blotches.

Green tree pythons spend most of their time looped around branches, waiting to ambush potential prey. They have heat-sensing pits near their lips, helping them to detect warm-blooded animals.

They are non-venomous, and do not pose any danger to humans.

Non-Venomous Green Snakes in Australia

Contrary to popular belief, not every snake in Australia is venomous. One of Australia’s most common non-venomous snakes is green in color: the Australian tree snake.

Australian Tree Snake (Dendrelaphis Punctulatus)

Australian Tree SnakeThe Australian tree snake, of northern and eastern Australia and New South Wales, is one of Australia’s most common non-venomous snakes. Though individuals are usually grass-green in color, they can also be dark green, black or even blue.

They are reasonably defensive, and have been known to bite humans. However, because they are non-venomous, they don’t pose any medical risk. They can usually be found in long grass, hunting amphibians and lizards.

If you ever encounter a green snake in the wild, you now have a much better chance of being able to identify it. Remember, though, never to attempt to catch or touch a wild snake, even if you believe it to be harmless. Many venomous and non-venomous snakes that are green tend to look alike.