Most poisonous snakes in Brazil

Snakes or snakes are strictly carnivorous animals and although many people are afraid of them, they are animals that deserve to be preserved and respected , both because of their importance in the environment, but also because some species are of medical importance. An example of this is the venom of the jararaca, which isolated is used in the pharmaceutical industry for the development of an important medicine for the control of hypertension, and for the manufacture of surgical glue.

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In addition, the study of their poisons help doctors to develop better antidotes. Stay here at YourCatCareguide and discover the most poisonous snakes in Brazil .

It may also interest you: most poisonous frogs in Brazil

Types of harmless cobras

Harmless snakes are non-venomous snakes, that is, they have no venom. Some species may even produce venom, but they do not have the specific prey to inoculate venom into their victims. These types of harmless snakes have as characteristics:

  • Rounded head.
  • Rounded pupils.
  • They have no loreal area.
  • Adults can reach several meters in length.

In Brazil, the main harmless and non-venomous snakes are:


In Brazil there are only two subspecies, Boa constrictor constrictor and Boa constrictor amaralis , and both can reach up to 4 meters in length and have nocturnal habits. They prefer treetops, often traversing through the dry leaves of the soil to another territory in search of food. Since they do not have venom, it kills the prey by curling its body over it, compressing it and suffocating it, hence its characteristic name, and because of this its body is cylindrical with a strong constricting musculature, and with the finest tail.

Due to its temperament sometimes considered docile and not aggressive, the jiboia is becoming popularized as Pet.


It is the second largest snake in the world, can live up to 30 years and reach up to 11 meters, and there are reports throughout the history of sucuris of 12 and 13 meters in length that can get to swallow a human being. Many myths revolve around the sucuri, see here in this other article of YourCatCareguide, the 4 species of Anaconda , the popular name that gave this animal fame in theaters. The snake’s preferred habitat is the banks of lakes, streams and freshwater rivers, where it lurks waiting for prey to appear for water, its victims include frogs, frogs, birds, other reptiles and small mammals.


It can be found in the northern territory of Brazil and in the Amazon forest and despite its black to yellow coloration, which could indicate that it is a venomous snake, the Caninana has no poison. However, it is a rather territorialistic snake and so can become quite aggressive. It can reach up to 4 meters.

False coral

In Brazil, we have a variety of coral called False Coral , of the species Oxirhopus guibei . It is a fairly common snake in the vicinity of São Paulo, and has a coloration that is very similar to a coral, but this particular species does not have the prey of poison inoculation, therefore, they are harmless.


Belonging to the group of constricting snakes, it has more prominent coloration for the green, can reach up to 6 meters in length. And although they do not have the tusks to inoculate poison, their teeth are large and curved inward.

Serpents of Venomous Brazil

Venomous snakes have characteristic elliptical pupils and a more triangular head , as well as the loreal pit and prey capable of inoculating large amounts of venom into their victims. Some species have diurnal habits and other nocturnal habits, but if they feel threatened, even a kind of nocturnal habit can move during the day to find other territory.

The Brazilian fauna has an immense variety of snakes, and among the venomous snakes that live in Brazil we can find the most diverse types of poisons, with different toxic actions. Therefore, in case of a snakebite accident it is important to know what kind of snake caused the accident so that the doctors can know the correct antidote.

Largest venomous snakes in Brazil

The largest venomous snakes that can be found in Brazil are:

Real Coral

One of the most poisonous snakes in the world in Brazil, it is named because of its great resemblance to False Coral, which is not venomous. Its venom is capable of causing respiratory distress and can lead an adult to death in a few hours. It has a very characteristic coloration in red, black and white and it is not possible to differentiate a false coral from a true one only by the arrangement of the colors, since the only way to differentiate the two is through the tusks, loreal pit and head, which can be somewhat difficult for a layman, then in doubt keep away.


Known by the rattle in its tail that produces a quite characteristic sound when this snake feels threatened, being able to reach up to 2 meters in length. Its venom is able to cause muscle paralysis, and can be lethal because it is hemotoxic, meaning it causes blood clotting, affecting the blood circulation to the heart.

Surucucu pico-de-jaca

It is considered the most poisonous snake in South America and one of the most poisonous in the world. Its coloration is brown with diamonds in dark brown, and can reach up to 5 meters in length. Its neurotoxic venom can cause low blood pressure, altered heart rate, bleeding due to anticoagulant properties of the toxin, diarrhea, vomiting, necrosis and renal failure, leaving sequels if the victim is rescued.


The name of this venomous Brazilian snake is well known to people who live in the interior and fishermen. It has a tuned body, brownish color and darker triangular spots throughout the body, camouflaging well between dry leaves on the ground. Its venom can cause limb necrosis, low blood pressure, blood loss due to anticoagulant action, kidney failure and brain bleeding, causing the death of the individual.

See also our article on the most poisonous snakes in the world .

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    Emily Harris

    Hi Guys, Girls, and Cats:-pI am Emily Harris, and you can see in above pic. She loves me I swear. I saved her from a dumpster a few weeks back.

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