Quick answer: the five most impressive green snakes in this ranking are the Green Vine Snake (Oxybelis fulgidus), the Eastern Green Mamba (Dendroaspis angusticeps), the Spotted Bush Snake (Philothamnus semivariegatus), the Green Tree Python (Morelia viridis) and the Western Natal Green Snake (Philothamnus occidentalis). They are ranked by how unusual their biology is, not by how dangerous they are.
- Venom dangerous to humans: only the Eastern Green Mamba.
- Venom mild for humans: the Green Vine Snake, whose toxin is aimed mainly at lizards and birds.
- Non-venomous: the Spotted Bush Snake, the Green Tree Python and the Western Natal Green Snake.
- Where they live: tropical Americas, eastern and southern Africa, New Guinea and northern Australia.
- Most surprising fact: baby Green Tree Pythons hatch yellow or red and turn green without shedding their skin.
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Green is a common color among snakes, but it hides very different stories. The different types of green snakes belong to separate families, live on separate continents and survive in their own ways. If you have already read our posts on black, yellow and orange snakes, this one closes out the series.
How this ranking was built
The order does not answer the question of which snake is most dangerous. Species rank higher when science has found something unexpected about them: a venom tuned to a specific prey, a family tree that overturns an assumption, a color change that comes with a change of lifestyle, or breeding behavior described only recently. That is why a little-known species sits at number one.
Comparison table of the five green snakes
| Rank | Snake | Main range | Risk to humans | Standout trait |
|---|---|---|---|---|
| 5 | Green Vine Snake (Oxybelis fulgidus) | Southern Mexico, Central America, tropical South America | Low. Venom mild for humans | Toxin aimed at lizards and birds |
| 4 | Eastern Green Mamba (Dendroaspis angusticeps) | East African coast to eastern South Africa | High. Potent venom | Sister species of the black mamba |
| 3 | Spotted Bush Snake (Philothamnus semivariegatus) | Sub-Saharan Africa | None. Non-venomous | Inflates its neck to show blue skin |
| 2 | Green Tree Python (Morelia viridis) | New Guinea, nearby islands, Cape York Peninsula (Australia) | Low. Non-venomous | Turns green from yellow or red without shedding |
| 1 | Western Natal Green Snake (Philothamnus occidentalis) | South Africa and western Eswatini | None. Non-venomous | Communal egg-laying sites and male combat |
5. Green Vine Snake (Oxybelis fulgidus) No. 5
The Green Vine Snake is a tree-dwelling, daytime colubrid found from southern Mexico to tropical South America. Its body is extremely long and thin, and its pointed snout makes it look more like a vine than an animal. That snout has a job: researchers link it to sharper vision, which helps the snake catch quick prey, mainly iguanian lizards and perching birds.
It is a rear-fanged snake, with two enlarged teeth at the back of the upper jaw. Its secretion contains fulgimotoxin, a three-finger toxin that is neurotoxic to lizards and birds. A study of the venoms of Oxybelis aeneus and Oxybelis fulgidus, published in the journal Toxicon, found both to be moderately toxic to mice and Hemidactylus geckos but nearly ten times more toxic to Anolis lizards, which are natural prey. It is a neat example of venom matched to diet.
For people the risk is usually low. The first documented bite in the wild happened in the Brazilian Amazon and involved local pain, redness, swelling and bleeding, plus dizziness and a fast heart rate. The authors note that most colubrid envenomations are not severe. Any snakebite still calls for medical attention.
4. Eastern Green Mamba (Dendroaspis angusticeps) No. 4
Say "mamba" and most people picture the black mamba. Yet its closest relative is this green snake. A 2025 phylogenetic study in the Zoological Journal of the Linnean Society found that Dendroaspis angusticeps is the sister species of Dendroaspis polylepis, and it rejected the idea that the three green mambas form a group of their own. In other words, bright green coloring alone does not unite them in a single lineage.
Its venom is also different from the black mamba's. A 2016 proteomic analysis identified 42 proteins, mostly three-finger toxins (69.2%) and Kunitz-type proteinase inhibitors (16.3%). These include fasciculins, which block the enzyme acetylcholinesterase, a key player in signaling between nerves and muscles, as well as dendrotoxins. No alpha-neurotoxins were found, even though they account for much of the toxicity of black mamba venom. Almost no isolated fraction killed mice, which suggests that the whole venom works through several components acting together.
The Eastern Green Mamba lives mostly in trees, rarely comes down to the ground and blends into foliage. It eats birds, eggs and small mammals, including bats. Its range runs along the coast from Kenya to eastern South Africa. It is shy and avoids people, but its venom is serious. If you travel in that region, keep your distance and read up on snake warning signs. For comparison, see our black mamba facts and the ranking of the most venomous snakes in the world.
3. Spotted Bush Snake (Philothamnus semivariegatus) No. 3
The Spotted Bush Snake is one of the most common harmless green snakes in sub-Saharan Africa. It climbs easily through branches, roofs and walls, and sometimes slips into houses looking for geckos. Its body is very slender, bright green to olive, with dark spots and cross-bars on the front part and a long tail of a single color.
It hunts actively by day. Its diet includes lizards, especially geckos, along with frogs and, less often, bats, birds and rodents. When threatened it can inflate its neck and reveal blue skin that normally stays hidden between the scales. It usually grows to about one meter.
Its main problem is an undeserved reputation. It is often mistaken for a mamba or a boomslang and killed for no reason. It is not venomous, though it may bite if grabbed. To understand how snake groups differ, read our guide to the difference between a snake, a viper and a cobra.
2. Green Tree Python (Morelia viridis) No. 2
The Green Tree Python lives in New Guinea, on several nearby islands and on the Cape York Peninsula in northeastern Australia. It spends almost its whole life in trees, and adults average 1.5 m in length and are a vivid green. Hatchlings look nothing like that: they measure about 30 cm and are yellow or brick red.
The change begins around the end of the first year, when the snake reaches 53 to 59 cm. According to a field study on Cape York, it happens quickly and without shedding. Red animals first lighten to yellow and only then turn green. Lifestyle shifts along with color. Before the change, the pythons are active by day and take small prey, such as the skink Carlia longipes and daytime invertebrates. As adults they are nocturnal canopy dwellers that go after larger prey. A paper in Biology Letters showed that each color camouflages the snake from visually hunting predators such as birds in the habitat it uses at that stage.
Its resemblance to the emerald tree boa (Corallus caninus) of South America is a textbook case of convergent evolution: two separate lineages arrived at a similar body, color and hunting style. One taxonomic note: some recent studies split the northern New Guinea populations into a separate species, Morelia azurea, while the Cape York animals belong to Morelia viridis in the strict sense. If big pythons interest you, see the largest snakes in the world.
1. Western Natal Green Snake (Philothamnus occidentalis) No. 1
It has no famous venom and it does not change color, which is why first place may surprise you. Until 2019 it was treated as a subspecies of Philothamnus natalensis; today it is a species in its own right. It lives in South Africa, from the Western Cape to Limpopo, and in western Eswatini. It is active by day, climbs well, and is also often found on the ground along shaded rivers, feeding on geckos and frogs. It is harmless to people. A dark eye sets it apart from its eastern relative, and when threatened it can inflate its throat to show turquoise speckles between the scales. It averages about 75 cm, though it can exceed one meter.
The most interesting part came from a 2025 paper in The Science of Nature. Between 2012 and 2024, in KwaZulu-Natal and the Eastern Cape, the authors documented communal egg-laying sites: toward the end of the southern spring (October and November), several females gathered and laid eggs in wall crevices or riverbanks near water. They also described two kinds of visual communication and combat between males. In one observation a female was accompanied by at least six males, and a mating was recorded. A plain-looking snake turns out to have a more social and complex breeding life than anyone assumed.
What the top 5 green snakes eat and when they hunt
| Snake | Documented prey | Activity and habitat |
|---|---|---|
| Oxybelis fulgidus | Iguanian lizards and perching birds | Daytime, arboreal |
| Dendroaspis angusticeps | Birds, eggs, small mammals including bats | Mostly arboreal |
| Philothamnus semivariegatus | Lizards (especially geckos), frogs, also bats, birds and rodents | Daytime, trees, shrubs and buildings |
| Morelia viridis | Juveniles: small skinks and invertebrates. Adults: larger prey | Shifts from daytime to nocturnal as it turns green |
| Philothamnus occidentalis | Geckos and frogs | Daytime, trees and ground near rivers |
Frequently asked questions about green snakes
What are the most impressive green snakes in the world?
In this ranking: the Green Vine Snake (Oxybelis fulgidus), the Eastern Green Mamba (Dendroaspis angusticeps), the Spotted Bush Snake (Philothamnus semivariegatus), the Green Tree Python (Morelia viridis) and the Western Natal Green Snake (Philothamnus occidentalis). The order reflects how unusual each species' biology is, not how dangerous it is.
Are all green snakes venomous?
No. Of the five species on this list, only the Eastern Green Mamba has venom that is dangerous to humans. The Green Vine Snake's venom is usually mild for people, and the other three are non-venomous. Being green says nothing about whether a snake is venomous.
Which green snake on the list is the most dangerous?
The Eastern Green Mamba. It is shy and avoids contact, but its venom is potent and a bite needs immediate medical care. For more dangerous species, see the most dangerous vipers in the world.
Is there a snake that changes color as it grows?
Yes. The Green Tree Python hatches yellow or brick red and turns green at 53 to 59 cm, around its first birthday, without shedding. The color change coincides with a change in habitat and hunting schedule.
How can you tell a green mamba from a harmless green snake?
Color alone is not a reliable guide, and in Africa harmless green snakes are often mistaken for mambas and killed. The safest approach is to keep your distance, not touch the snake and ask a local expert. Snakes of the genus Philothamnus are harmless but can bite if grabbed.
What should you do after a snakebite?
Stay calm, keep the affected limb still and get to a medical facility right away. Do not cut the wound or try to suck out the venom. The World Health Organization publishes official information on snakebite envenoming.
Keep exploring
If you enjoyed this post, you may also like our articles on false cobras and false vipers and snakes that eat other snakes.
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