7 Venomous Snakes Found in Ecuador (2025)
What types of venomous snakes live in Ecuador?
Due to the variety of habitats in Ecuador, there are dozens of different snakes you might see. While many species are not harmful to humans, you must be careful because some types are INCREDIBLY venomous and highly dangerous. Some snakes can even cause death if the bite is not treated quickly.
In the article below, I have listed some of the most common venomous snakes you might encounter in Ecuador. For each species, you will find out how to identify that snake correctly, along with pictures and interesting facts!
*If you come across any of these species, PLEASE DO NOT DISTURB! Venomous snakes are dangerous animals and should be left alone. The more you agitate them, the more likely you could get bitten. DO NOT RELY ON THIS ARTICLE to correctly identify a snake that has recently bitten you. If you have recently been bitten, GO DIRECTLY to the nearest hospital to get help and to determine if the snake is venomous.*
7 Venomous Snakes in Ecuador:
#1. Eyelash Viper
- Bothriechis schlegelii
Also known as Eyelash Pit Viper, Eyelash Palm Viper, Schlegel’s Viper, Eyelash Lancehead, Eyelash Mountain Viper, Horned Palm Viper, Parrot Snake
Identifying Characteristics:
- Adults are generally 55-82 cm (22-32 in) long.
- Their heads are broad and triangular.
- Coloration depends on habitat. These include bright yellow, green, orange, or pink. You might also see dark speckles dotted all over the body.
Look for this small venomous snake in Ecuador in forests and woodlands.
The fancy-looking Eyelash Viper earned its name from the pair of modified scales above its eyes which resemble eyelashes. A myth tells of this viper winking at its victims after biting them. Of course, snakes don’t have eyelids, so they can’t actually wink!
Did you know that Eyelash Vipers are resourceful creatures? To hydrate, they drink the water droplets that gather on leaves. In addition, they use their tails to grab onto branches, positioning themselves to hunt rodents, lizards, and small birds at night.
Eyelash Vipers are generally docile but will strike in defense if threatened. They’re moderately venomous, and while there are no recorded human deaths, their bites can still be very painful. Be careful if you happen to find one!
#2. Fer-de-lance
- Bothrops atrox
Also known as Common Lancehead, Barba Amarilla
Identifying Characteristics:
- Adults can grow 75-125 cm (30-49 in) in length.
- Look for a series of trapezoids across the body.
- Coloration is usually olive, gray, or brown. They have light-colored bellies, commonly white or cream.
- These snakes have golden irises and black tongues.
The venomous Fer-de-lance is responsible for most of the snake bites in Ecuador.
So, it’s best to tread carefully if you find yourself in the Amazon region. While these snakes live primarily in dense forests, they also wander into coffee plantations when hunting.
As with other pit vipers, the Fer-de-lance has heat sensors below its eyes to track prey. They easily devour smaller prey like frogs and tarantulas. However, when it comes to larger prey, these snakes bite and then let go. The venom eventually kills the animal while the snake tracks it down to consume it.
This snake isn’t only dangerous to its prey, either. A bite from this venomous snake targets the circulatory system and can cause serious internal bleeding in humans. Interestingly, the younger snakes have faster-acting venom. Either way, you should seek medical attention quickly if you get bitten by this aggressive species.
#3. Rainforest Hog-nosed Viper
- Porthidium nasutum
Also known as Hognosed Pit Viper.
Identifying Characteristics:
- Adults are 40-60 cm (16-24 in) long. The females tend to be relatively larger than the males.
- The body is stout, with a triangular-shaped head and a short, thin tail. They have an upturned snout.
- Their coloring is shades of brown with alternating cream and dark brown rectangular marks on the back.
As its name suggests, this species is most often found in rainforests. The Rainforest Hog-nosed Viper is a terrestrial species and, due to its color, is difficult to spot in the jungle foliage.
In addition to its camouflage, you’ll have trouble spotting a Rainforest Hog-nosed Viper because it’s nocturnal. During the nighttime, it hunts frogs, lizards, small mammals, small birds, and other snakes.
Use extreme caution when you’re in this species’ territory. It’s a highly venomous viper, and if a bite goes untreated, it can cause death in humans. Unfortunately, Rainforest Hog-Nosed Vipers frequently pass through plantations and sometimes enter gardens, so bite incidents are not uncommon.
If you receive a bite from one of these venomous snakes in Ecuador, get treatment right away.
The symptoms are painful, often severe, and can last days. Redness and pain around the bite, nausea, vomiting, trouble breathing, low heart rate, and vision problems are all common symptoms. Avoid this dangerous snake if possible!
#4. Terciopelo
- Bothrops asper
Identifying Characteristics:
- On average, these vipers are 120-180 cm (47-71 in) long.
- Terciopelos have wide, flat heads.
- Females can grow up to 10 times larger than males.
- They range from brown to gray. Patterns include dark spots and stripes that form triangles along the body.
The Terciopelo, which is also referred to as a Fer-de-lance in its range, is a venomous species you can find in tropical rainforests and lowlands. They have a fierce reputation and are responsible for many of the snakebites that occur in Ecuador. They also have large fangs and an exceptionally high venom yield. This snake is impressive but also terrifying and has been nicknamed “the ultimate pit viper”!
This large pit viper is a patient predator. It will disguise itself among leaf litter for long periods, then bite swiftly once prey comes in range. The Terciopelo’s usual meal includes various insects, rabbits, and crayfish.
The venom of a Terciopelo is dangerously potent. Unfortunate victims can experience fevers, internal bleeding, and even death in extreme cases. It’s important to seek medical attention immediately if you think you’ve been bitten. If the Terciopelo is cornered, it will strike faster than you can react. So always keep a respectful distance!
#5. Mountain Keelback
- Helicops angulatus
Also known as Brown-banded Watersnake, Water Mapepire
Identifying Characteristics:
- Adults grow to a maximum length of 78 cm (31 inches).
- Their eyes and nostrils are situated at the top of their heads.
- These snakes tend to be olive or grayish brown. Dark, jagged bands cover their bodies.
The Mountain Keelback is one of the slowest venomous snakes in Ecuador!
These sluggish travelers only move about a few meters each day. If you want to find one in action (or non-action, because of their slow speed), look in the freshwater bodies of the Amazon basin.
Because of its slow-moving nature, this species prefers to ambush unsuspecting prey. At night, Mountain Keelbacks lie in wait for unlucky animals swimming by. Smaller fish, frogs, and tadpoles are all on the menu. However, sometimes they are the unlucky ones as they are common prey for herons and larger snakes.
Mountain Keelbacks are only mildly venomous. However, they can be very irritable when disturbed. In defense, they will coil into an S position before lunging into a bite. They can’t kill you, but their bites are still quite painful. Hands off!
#6. South American Bushmaster
- Lachesis muta
Also known as Atlantic Forest Bushmaster, Mapepire Zanana
Identifying Characteristics:
- Adults are 200-250 cm (79-98 in) long.
- They have broad heads.
- Their coloring can be yellowish, tan, or gray-brown.
- Look out for a scaly diamond pattern and a pale-colored underside.
True to its name, the South American Bushmaster loves to hide in the bushes and undergrowth of forests with frequent rain. This stealthy snake lurks near animal trails, waiting to ambush rodents, birds, and other smaller reptiles.
Bushmasters are solitary creatures. In fact, they are so elusive that herpetologists are still arguing about how dangerous they are. When they’re not hunting, these pit vipers rest in hollow logs and small burrows. So, don’t go peeking inside unless you’re prepared to come across one!
Loud rustling among fallen leaves can indicate the presence of a South American Bushmaster. They usually try to escape if disturbed but stay cautious nonetheless! Most researchers agree that they’re highly venomous. Untreated bites are thought to be potent enough to kill.
#7. Redtail Coral snake
- Micrurus mipartitus
Identifying Characteristics:
- Adults are 60-89 cm (24-35 in) long.
- They have thin, cylindrical bodies, small heads, and short fangs.
- Their coloring is black and yellow or white alternating bands, and they have red heads and black snouts.
Redtail Coralsnakes prefer mountains and rainforests with dense vegetation. Occasionally, you might see them in coastal shrub areas and dry, rocky regions.
Unlike most venomous snakes in Ecuador, this one is semi-fossorial.
This means they spend most of their time underground or burrowed in the foliage of the forest floor. Here, they feed on other reptiles and amphibians. They prefer smaller prey as they swallow meals whole and have small mouths.
Although Redtail Coralsnakes are timid and nocturnal, they will strike if surprised, and their venom is highly toxic. Most encounters are with agricultural workers. If left untreated, a victim can suffer paralysis, respiratory arrest, and even death.
Check out these guides to other animals found in Ecuador!
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17 COMMON Snakes Found in Ecuador!
-
The 25 MOST Common Birds That Live in Ecuador!
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The 21 MOST Common SPIDERS Found in Ecuador!
Which of these venomous snakes have you seen before in Ecuador?
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