16 Texas Poisonous Animals

Texas Poisonous Animals. Texas, known for its diverse landscapes, is home to an array of captivating wildlife. Among them, some conceal a potent secret – poison.

In this article, we’ll look into Texas’ poisonous animals, exploring what sets them apart, why they’re venomous, and how to coexist safely with them.


What Are Poisonous Animals?

Texas Poisonous Animals
A picture of a scorpion

Poisonous animals are those that produce toxins, chemicals, or venoms that can cause harm or even death when delivered to a potential threat or prey.

These toxins are typically used as a defense mechanism against predators or as a means to immobilize prey.


Read also: Are Komodo Dragons Poisonous?


Why Are They Considered Poisonous?

Poisonous animals have developed these poisonous defenses to help them stay alive and do well in their surroundings. Here are some common reasons why certain animals are considered poisonous:

  • Predator Deterrence:
    Toxins are a common defense mechanism used by poisonous animals. Venom is released or injected when threatened to scare off would-be predators.


  • Prey Capture:
    Poisonous creatures may incapacitate or even kill their prey with their venom. They can quickly impair their prey by injecting venom or secreting toxins, making it easier to catch and devour.


  • Competitive Advantage:
    Toxins may be employed in the pursuit of food or a partner. The poisonous animal has a competitive advantage from this, increasing its chances of survival and procreation.


Read also: Are Stink Bugs Poisonous to Dogs? The Behavior of Stink Bugs


16 Texas Poisonous Animals

Now, let’s take a closer look at 16 of Texas’ fascinating and potentially dangerous inhabitants:

1. Western Diamondback Rattlesnake (Crotalus atrox)

19 Texas Poisonous Animals
Western Diamondback Rattlesnake

This deadly pit viper is one of Texas’s most recognizable and dreaded snakes, thanks to its striking diamond-shaped pattern and rattling tail. Originally found in the southwestern United States and adjacent areas of Mexico, the Western Diamondback Rattlesnake is a venomous pit viper.

Caution should be exercised around Western Diamondback Rattlesnakes, and the animals should be admired from a safe distance out of respect for their important ecological role.


2. Cottonmouth Snake (Agkistrodon piscivorus)

19 Texas Poisonous Animals
A picture of Cottonmouth Snake


Cottonmouth is a poisonous pit viper that goes by the name “water moccasin” when it’s near water. When threatened, their mouths turn a striking white color. Its dark body and white mouth make it easy to see in aquatic environments.

Cottonmouths can swim well and hunt fish, frogs, and small mammals for food. Although their poisonous bite can be harmful, they generally avoid contact with humans.


3. Coral Snake (Micrurus spp.)

19 Texas Poisonous Snakes
A picture of a Coral Snake.

Coral snakes have powerful neurotoxic venom and distinctive red, yellow, and black stripes. As the proverb goes, “Red touches yellow, kill a fellow; red touches black, venom lack,” which helps set them apart from non-venomous imitators.


4. Black Widow Spider (Latrodectus spp.)

19 Texas Poisonous Animals
A picture of the Black Widow Spider

Shiny black bodies with a red hourglass mark on the abdomen distinguish this species of spider. Humans can be poisoned by their neurotoxic venom.


5. Brown Recluse Spider (Loxosceles reclusa)

19 Texas Poisonous Animals
A picture of Brown Recluse Spider

The venom of brown recluse spiders, which may be recognized by the violin-shaped mark on the cephalothorax, can on rare occasions induce necrotic skin sores. There are poisonous spiders in the United States, and one of them is the Brown Recluse Spider (Loxosceles reclusa).

It prefers quiet, secluded places with lots of cover. Bites may cause necrotic skin lesions, but they are uncommon. The brown recluse spider is shy and rarely comes into touch with humans.


6. Southern Copperhead (Agkistrodon contortrix)

19 Texas Poisonous Animals
A picture of Southern Copperhead

The southern copperhead, a type of pit viper known for its distinctive coppery-colored head, is typically found in or near forests. It lives in a variety of habitats, including woodlands and marshes, and is easily recognizable thanks to its coppery head and characteristic cross-banded pattern.

Despite its venom, this animal generally avoids contact with humans, attacking only when threatened or provoked. The copperhead mostly feeds on amphibians and small rodents.


7. Texas Coral Snake (Micrurus tener)

19 Texas Poisonous Animals
A picture of Texas Coral Snake

This coral snake is poisonous and lives in certain areas of Texas.


8. Pigmy Rattlesnake (Sistrurus miliarius)

19 Texas Poisonous Animals
A picture of Pigmy Rattlesnake (Sistrurus miliarius)

The rattle of this tiny rattlesnake might not be very loud but, its venom is quite powerful. Located in the southeastern United States is the venomous Pygmy Rattlesnake (Sistrurus miliarius).

It has a rattling tail and is small for a snake, yet if provoked it can give a dangerous bite. These snakes help keep rodent numbers in check.


9. Red Harvester Ant (Pogonomyrmex barbatus)

19 Texas Poisonous Animals
A Very closeup picture of a red harvester ant

Pogonomyrmex barbatus, also known as the Red Harvester Ant, is a species of large, aggressive ant native to the southwestern United States.

Its reddish-brown coloring comes from the venom it uses to inflict painful stings, which can trigger allergic reactions in some people. These ants’ scavenging and foraging activities are essential to the health of the ecosystem.


10. Eastern Massasauga (Sistrurus catenatus)

19 Texas Poisonous Animals
A picture of Eastern Massasauga

Sistrurus catenatus, also known as the Eastern Massasauga, is a species of poisonous rattlesnake found in the eastern United States. It is easy to see because of its rattling tail, yet this snake is actually rather harmless until disturbed.


11. Copperhead Snake (Agkistrodon contortrix)

19 Texas Poisonous Animals
A picture of Copperhead Snake (Agkistrodon contortrix)

The copperhead is another type of pit viper found in Texas; it has a striking appearance and prefers to live in grassy or forested regions. It stands out because of its coppery coloring and unusual crossbanding. It is venomous but generally avoids contact with humans.


12. Scorpion (Various Species)

Texas Poisonous Animals
A picture of a poisonous scorpion

There are various types of scorpions in Texas, and a few of them have poisonous bites. The bark scorpion has the worst reputation. Texas is home to numerous species of the arachnid known as the scorpion.

The tip of their tail is equipped with a poisonous stinger that they employ for self-defense and hunting. While the venom of most scorpion species is harmless to humans, stings from a few species can be rather severe.


13. Gila Monster (Heloderma suspectum)

Texas Poisonous Animals
A picture of Gila Monster (Heloderma suspectum)

The Gila monster is an extremely rare and poisonous reptile that lives in the southwestern regions of Texas.


14. Texas Brown Tarantula (Aphonopelma hentzi)

Texas Poisonous Animals
A picture of Texas Brown Tarantula

Their poison is not fatal to humans, but it can be unpleasant. Large, hairy spiders like this are common in the Lone Star State. The Southwestern United States, including sections of Texas, is home to venomous lizards called Gila Monsters (Heloderma suspectum).

One of the few venomous lizards in the world, it is easily recognizable by its bright orange and black coloring.


15. Texas Centipede (Scolopendra heros)

Texas Poisonous Animals
A picture of Texas Centipede (Scolopendra heros)

The Texas centipede (Scolopendra heros) is a giant, carnivorous arthropod native to the state of Texas and neighboring areas. With its intimidating look and many legs, this creature is capable of delivering painful bites with venom that can cause localized reactions.

Although they are not normally hostile to humans, it is best to avoid touching them to avoid getting stung.


16. Texas Alligator (Alligator mississippiensis)

Texas Poisonous Animals
A picture of Texas Alligator (Alligator mississippiensis)

American alligators live throughout Texas, and while they aren’t technically toxic, they can nonetheless be dangerous if provoked.

If you see any of these species in the wild, you should treat their habitats with the utmost respect because of the vital functions they play in the environment. Keep your mind about yourself and practice common sense when it comes to your safety.


What to do if bitten by a poisonous animal

  • Maintain as much composure as you can. An accelerated heart rate and quicker venom distribution have both been linked to panic.
  • If the animal is still close, go as far away from it as possible slowly and cautiously to prevent getting bitten or stung again.
  • When it is safe to do so, attempt to determine what kind of animal bit or stung you. The medical community can benefit much from this data.
  • If you need help, call 911 right away, or have someone else do it for you. Describe where you are and what happened to you in terms of the bite or sting.
  • Make sure the bitten or stung region doesn’t move around too much. If a snake or spider bites you, this can help contain the venom.
  • If the bite is on an extremity, release any constricting clothes, jewelry, or other items from around the area. Possibility of swelling.
  • Reduce the risk of infection by washing the bite or sting site with soap and water.
  • If the bite is on an arm or leg, try to elevate the affected area to alleviate any swelling.
  • Wrap an ice pack in a thin towel or cloth and apply it to the bite area to create a cold compress. Avoid putting ice on your skin directly.
  • Never try to remove the poison by cutting the wound or sucking on it.
  • If you experience any new symptoms, such as swelling, pain, nausea, difficulty breathing, or changes in consciousness, get medical assistance immediately. Please share this with doctors and nurses.
  • You Should Wait for Medical Help Even if Your Symptoms Don’t Seem Serious Right Away. Professional medical attention, including antivenin if available, is usually necessary for many poisonous bites and stings.


Read also: Are Centipedes Poisonous To Cats?



Texas is home to a wide variety of wildlife, many of which are interesting and even threatening to humans.

It is important for Texans and visitors alike to have a firm grasp on the venomous creatures that call the Lone Star State home.

While these creatures have the potential to cause harm if provoked, they are essential to maintaining Texas’s natural equilibrium. To safeguard your safety and the well-being of these wonderful species, it’s important to be well-informed before venturing into the Texas wilds.

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