Texas is home to a high diversity of venomous wildlife, particularly snakes and spiders. While fatalities are rare due to modern medicine, several species possess medically significant venom that requires immediate attention. Corpus Christi Caller-Times +1

Venomous Snakes

Texas has the highest number of snake species in the U.S., with roughly 15% being venomous. They are categorized into four main groups: Corpus Christi Caller-Times

Rattlesnakes: The most common is the Western Diamondback, which is widespread across most of the state. Other species include the Timber Rattlesnake (East Texas) and the highly venomous Mojave Rattlesnake (West Texas), which possesses a potent neurotoxin.

Copperheads: These are the most common cause of venomous snakebites in Texas. They are well-camouflaged and often found in wooded areas.

Cottonmouths (Water Moccasins):Semi-aquatic snakes found near water sources in East and Central Texas. They are known for their defensive “gaping” posture, showing a white mouth lining.

Coral Snakes: Small, brightly colored snakes with neurotoxic venom. Remember the rhyme: “Red touch yellow, kill a fellow” to distinguish them from harmless mimics. Corpus Christi Caller-Times +7

Venomous Spiders & Insects

Brown Recluse: Often found in dark, undisturbed areas like closets or woodpiles. Their venom can cause necrotic skin lesions.

Black Widow: Identified by the red hourglass on the underside of their abdomen. Their neurotoxic bite causes intense muscle pain and cramping.

Puss Caterpillar (Asp): A “stinging” caterpillar covered in fine hairs that hide venomous spines. Contact causes severe, radiating pain.

Striped Bark Scorpion: The most common scorpion in Texas. While painful, its sting is rarely medically dangerous unless the person is allergic.

Texas Red-Headed Centipede: Can grow up to 8 inches long and delivers a very painful, though usually non-lethal, bite. Texas Poison Center Network +8

Marine Dangers

Portuguese Man-O-War: Often found on Gulf Coast beaches. Its long tentacles contain stinging cells that cause intense pain and, in rare cases, severe systemic reactions.

Stingrays: Common in shallow coastal waters. They can deliver a painful puncture wound with a venomous barb if stepped on. Texas Poison Center Network +3

For emergencies, contact the Texas Poison Center Network at 1-800-222-1222. Texas Poison Center Network +1

Are you looking for identification tips for a specific animal you’ve seen, or do you need first-aid advice for a recent bite or sting?

The most venomous creatures in Texas include four main types of snakes—rattlesnakes, copperheads, cottonmouths, and coral snakes—along with dangerous spiders like the brown recluse and black widow. While many, such as the western diamondback, are highly venomous, fatalities are rare, and bites often occur when people attempt to handle or kill them. Texas Parks & Wildlife Department (.gov) +4

Top Venomous Snakes in Texas

Rattlesnakes: Multiple species exist, including the Western Diamondback (most common/deadly), Timber, Western Pygmy, and Mojave. Corpus Christi Caller-Times +1

Copperheads: Responsible for the highest number of snakebites in the state, often found in rocky, wooded areas. MultiBriefs +1

Cottonmouths: Also known as water moccasins, these semi-aquatic, aggressive vipers are found near water. razer gaiters +1

Texas Coral Snake: Identifiable by red, yellow, and black bands, this species has extremely potent venom but rarely bites unless handled. El Paso Times +1

Venomous Spiders and Insects 

• Brown Recluse: Small, shy spiders found in warm, dry, dark places; their venom causes tissue decay.
• Black Widow: Identified by a red hourglass shape, found in protected outdoor cavities.
• Puss Caterpillar (Asp): Known for causing intense pain and burning when touched.
• Scorpions and Centipedes: Common, with painful, though rarely fatal, stings. KSAT +4

Safety Tips

• Don’t handle: Most bites occur when trying to catch or kill snakes.
• Watch your step: Use caution in woodpiles, tall grass, and under debris.
• Wear protection: Thick boots and long pants help when hiking or working outdoors. 

Having Hand Caltured and released all of these species onsite in Corpus Christi Texad I know first hand the danger of venomous things and deadly fungus

David Michael Ramsey Surfman374 blacknbluepb@yahoo (503)298-0592

No body was harmed yet but I wouldn’t poke touch take anything from a release site you’ll die before you get medical care I promise