T
Species Profile

Texas Brown Tarantula

Aphonopelma hentzi

Big, brown, and mostly mellow.
texas brown tarantula/Shutterstock.com

Texas Brown Tarantula Distribution

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Endemic Species
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Texas brown tarantula (Aphonopelma hentzi)

At a Glance

Wild Species
Also Known As Hentz's tarantula, Texas tarantula
Activity Nocturnal+
Lifespan 20 years
Weight 0.04 lbs
Status Not Evaluated
Did You Know?

Size: adult females are commonly ~5-6.4 cm body length, with legspans often ~9-11 cm (reported in natural history accounts; see Punzo, 2007).

Scientific Classification

A large North American tarantula commonly encountered in the south-central United States and widely known as the Texas brown tarantula. Like other New World tarantulas, it is generally docile, slow-growing, and uses urticating hairs as a primary defense.

Kingdom
Animalia
Phylum
Arthropoda
Class
Arachnida
Order
Araneae
Family
Theraphosidae
Genus
Aphonopelma
Species
Aphonopelma hentzi

Distinguishing Features

  • Stout-bodied, brown to dark brown tarantula with relatively uniform coloration compared to more vividly colored species
  • New World tarantula with urticating hairs on the abdomen
  • Adults are often seen during seasonal male wanderings in late summer–fall in parts of its range
  • Builds/uses a silk-lined burrow or sheltered retreat; not a heavy web-builder like many araneomorph spiders

Physical Measurements

Males and females differ in size

Length
4 in (4 in – 5 in)
5 in (4 in – 5 in)
Weight
0 lbs (0 lbs – 0 lbs)
Top Speed
1 mph
running
Venomous

Appearance

Primary Colors
Secondary Colors
Skin Type Chitinous exoskeleton densely covered in velvety setae; abdomen bears New World urticating hairs used defensively.
Distinctive Features
  • Large, heavy-bodied New World tarantula; adults commonly ~4.5-6 cm body length, with legspan often ~10-12 cm (size varies by sex and individual).
  • Dense, plush-looking coat of brown setae; overall "earth-toned" camouflage typical of burrowing Aphonopelma.
  • Urticating hairs on abdomen are readily kicked when threatened; venom is generally mild to humans, with medically significant effects uncommon (reactions vary).
  • Burrow-associated lifestyle: typically occupies or modifies a silk-lined burrow/retreat; often most visible when males wander seasonally in autumn in parts of Texas/Oklahoma.
  • Male adult morphology includes tibial apophyses ("mating hooks") on the first legs and swollen palpal bulbs; females lack hooks and have a broader abdomen.

Sexual Dimorphism

Males mature sooner and appear leggier, with longer legs and mating structures (tibial hooks, palpal bulbs). Females are larger-bodied and more robust, often living decades longer and remaining more sedentary in burrows.

  • More slender body with proportionally longer legs (leggier silhouette).
  • Tibial apophyses ("hooks") on first pair of legs in mature males.
  • Enlarged palpal bulbs (mating organs) on pedipalps.
  • Typically smaller abdomen and less overall mass than adult females.
  • More robust body and thicker legs; larger overall mass.
  • No tibial hooks; pedipalps lack male palpal bulbs.
  • Broader abdomen, especially when well-fed or gravid.
  • Often shows heavier, denser overall setation, giving a plush appearance.

Did You Know?

Size: adult females are commonly ~5-6.4 cm body length, with legspans often ~9-11 cm (reported in natural history accounts; see Punzo, 2007).

Longevity: females are long-lived (often >20 years; 20-30+ years reported in captivity), while males typically live far shorter and often die within ~1 year after their final molt/maturation (Punzo, 2007).

Seasonal sightings: most "tarantulas on the road" in Texas/Oklahoma are mature males wandering to locate females, typically peaking in late summer-fall (often Aug-Oct; Punzo, 2007).

Defense-first strategy: like many New World tarantulas, A. hentzi primarily defends itself by kicking urticating hairs-tiny barbed setae that can irritate skin and especially eyes (general Theraphosidae trait; Punzo, 2007).

Venom note (New World trait): bites are uncommon; New World tarantula venom is generally considered of low medical significance to humans, with effects usually localized (reviewed broadly for theraphosids in Isbister & Gray, 2002).

Burrower lifestyle: individuals live in silk-lined burrows and often sit at the entrance at night as ambush predators (Punzo, 2007).

Bigger picture (hub-style): Aphonopelma is a highly diverse North American tarantula genus; modern revisions recognize many U.S. species, reflecting substantial hidden diversity within "brown tarantulas" (Hamilton et al., 2016).

Unique Adaptations

  • Urticating hairs (New World theraphosid hallmark): detachable, barbed abdominal setae used as a distance defense-effective against many vertebrate predators without physical contact (Punzo, 2007).
  • Silk as a sensory tool: silk-lined burrows and silk at the entrance help transmit prey/predator vibrations to the spider's sensitive mechanoreceptors (Punzo, 2007).
  • Book lungs and low metabolic pace: tarantulas combine book lungs with generally slow metabolism, supporting long lifespans and endurance in dry habitats (general Theraphosidae physiology; Punzo, 2007).
  • Moisture-buffering burrow microclimate: living underground reduces heat and desiccation stress in the south-central U.S., allowing activity in otherwise harsh seasonal conditions (Punzo, 2007).
  • Powerful chelicerae for hard-bodied prey: robust fangs allow subduing a wide range of insects and other arthropods (Punzo, 2007).
  • Scopulae (dense foot hairs): adhesive-like setae improve grip on rough surfaces and aid controlled climbing despite a heavy body (general tarantula morphology; Punzo, 2007).

Interesting Behaviors

  • Burrow construction and upkeep: maintains a silk-lined retreat and may ring the entrance with silk and debris, functioning as both shelter and a vibration-sensing "trip line" (Punzo, 2007).
  • Sit-and-wait hunting: typically an ambush predator at night, relying on vibration cues through the ground and silk rather than chasing prey (Punzo, 2007).
  • Seasonal male roaming: mature males leave their burrows and travel across open ground to find females-this is when people most often encounter A. hentzi in Texas and Oklahoma (Punzo, 2007).
  • Courtship signaling: males use substrate "drumming"/vibration signals to advertise identity and reduce the risk of being mistaken for prey by a female (common in theraphosids; summarized in Punzo, 2007).
  • Urticating-hair flicking: when threatened, it may pivot its abdomen and kick hairs with the hind legs; the behavior escalates before biting in many encounters (Punzo, 2007).
  • Molting seclusion: prior to ecdysis, individuals often block or retreat deeper into the burrow; after molting the new exoskeleton remains soft for days, increasing vulnerability (general tarantula biology; Punzo, 2007).
  • Maternal care: females guard the egg sac and may reposition it for temperature/humidity control and protection until spiderlings emerge (Punzo, 2007).

Cultural Significance

Aphonopelma hentzi, the Texas brown tarantula, is well-known in Texas and Oklahoma. Late-summer/fall male wanderings called a “tarantula migration” get attention. It helps nature education, is in folklore and the pet trade, eats insects, and feeds tarantula hawk wasps (Pepsis/Hemipepsis).

Myths & Legends

Spider Woman (Hopi and Pueblo stories) is a powerful creator and teacher who protects people and teaches skills like weaving. Not specific to Aphonopelma hentzi, but common spider lore where it lives.

Spider Woman in Navajo tradition: a protective, instructive figure who teaches weaving and aids cultural heroes; a major Indigenous story connection to spiders of the American Southwest.

A southern Italian legend claimed a spider bite could be cured by frantic music and dancing, shaping European fear and curiosity about large spiders.

"Tarantula season" lore in the U.S. Plains/Southwest: recurring local storytelling around late-summer/fall sightings-when wandering males appear on roads and porches-often framing the phenomenon as an annual "migration" event tied to seasonal change.

Conservation Status

NE Not Evaluated

Has not yet been evaluated against the criteria.

Population Unknown

Life Cycle

Birth 500 spiderlings
Lifespan 20 years

Lifespan

In the Wild
5–30 years
In Captivity
5–35 years

Reproduction

Mating System Promiscuity
Social Structure Solitary
Breeding Pattern Transient
Fertilization Internal Fertilization
Birth Type Internal_fertilization

Solitary adults meet briefly during a seasonal mating period (often late summer-fall) when males wander to female burrows. After courtship tapping, the male inserts sperm via palps; females can store sperm and may mate multiple times, then rear spiderlings alone.

Behavior & Ecology

Social None (solitary) Group: 1
Activity Nocturnal, Crepuscular, Diurnal
Diet Insectivore Large orthopterans (crickets/grasshoppers) - commonly documented as primary prey items for Aphonopelma spp. in field observations and as standard prey in captive feeding trials/husbandry.
Seasonal Hibernates

Temperament

Generally docile and slow-moving; prefers retreating to burrow over biting (common New World theraphosid pattern).
Primary defense is threat display plus urticating hair flicking; biting is uncommon but possible if restrained.
Adult males become seasonally nomadic while searching for females; females remain strongly site-faithful to burrows.
Across Aphonopelma and other theraphosids, true sociality is rare; most are solitary burrowers, with defensiveness varying by individual and disturbance.
Lifespan (commonly reported): females ~20-30 years; males typically ~5-10 years, with short post-maturity survival (species-specific quantitative field survivorship data are limited).

Communication

Substrate-borne vibrations (courtship drumming/leg tapping) used in mate recognition and receptivity assessment.
Chemical cues (pheromones) in female silk and on substrate guide male mate-searching and courtship.
Tactile signaling during courtship (palpation/leg contact) coordinates positioning and reduces female aggression.
Visual threat postures (raised forelegs, exposed fangs) function as close-range deterrent signaling.
Silk draglines provide chemical and mechanical information; also used for burrow/retreat modification and orientation.

Habitat

Biomes:
Temperate Grassland Temperate Forest Savanna
Terrain:
Plains Hilly Plateau Valley Rocky Sandy
Elevation: Up to 4921 ft 3 in

Ecological Role

Burrow-dwelling, nocturnal mesopredator in south-central U.S. grassland/scrub ecosystems (Aphonopelma hentzi), exerting top-down control on large ground-active arthropods and occasionally small vertebrates; also functions as prey for larger animals (e.g., mammals, birds, reptiles) and as a burrower that alters near-surface soil microhabitats.

Regulation of insect/arthropod populations (predation on orthopterans, beetles, roaches, other ground arthropods) Energy transfer from invertebrate prey to higher trophic levels (as prey for vertebrate predators) Soil disturbance and microhabitat creation via burrowing (localized aeration and refuge creation for commensal/secondary occupants)

Diet Details

Main Prey:
Crickets and other Orthoptera Cockroaches Beetles Moths and other large insects Spiders and arachnids Centipedes and other arthropods Small vertebrates +1

Human Interaction

Domestication Status

Wild

Aphonopelma hentzi (Texas brown tarantula) is not domesticated; it is kept as a pet but usually wild-caught, sometimes captive-bred. It lives in burrows, grows slowly, and adult males wander in breeding season. Its defense is threat posture, retreat, and shedding urticating hairs rather than dangerous venom. Humans meet them in yards, education, hobbies, research, and sometimes kill them from fear.

Danger Level

Low
  • Urticating hairs: can cause localized skin irritation/itching; higher risk if hairs contact eyes or are inhaled (ocular irritation is a notable concern).
  • Bite: typically defensive and uncommon; expected effects are usually localized pain, mild swelling, and puncture-wound risks typical of any bite (secondary infection risk if improperly cleaned). Medically significant systemic envenomation is not expected for this New World species.
  • Allergy: as with many arthropods, sensitization is possible; rare individuals may experience stronger reactions to hairs or bite.

As a Pet

Suitable as Pet

Legality: Aphonopelma hentzi (Texas brown tarantula) is usually legal to own in the United States, including Texas. But state, local, and park rules can limit taking from the wild, sales, or shipping. Check rules first.

Care Level: Moderate

Purchase Cost: $20 - $80
Lifetime Cost: $250 - $900

Economic Value

Uses:
Pet trade (hobbyist arachnid keeping) Education/outreach animals for schools, museums, and nature centers Research value (systematics, life history, behavior, physiology) Nature tourism/interpretive programming in regions where large tarantulas are seasonal/visible
Products:
  • Live animal sales (captive-kept; occasionally captive-bred where available)
  • Educational programming/interpretation (non-consumptive use)

Relationships

Predators 6

Tarantula hawk wasp
Tarantula hawk wasp Pepsis
Tarantula hawk wasp Hemipepsis
Greater roadrunner
Greater roadrunner Geococcyx californianus
Striped skunk Mephitis mephitis
Raccoon
Raccoon Procyon lotor
Nine-banded armadillo Dasypus novemcinctus

“The Texas brown tarantula is a classic big hairy spider!”

Texas browns are one of the most common tarantulas in the US and are often called Missouri tarantulas or Oklahoma browns. Their bodies and legs are covered in brown hairs that give them a furry look. They have eight long segmented legs with two additional arm-like pedipalps at the front of their bodies. Texas brown tarantulas are terrestrial, living in burrows abandoned by other animals or digging one of their own. During mating season, it is more common to see them out and about.

Amazing Texas Brown Tarantula Facts

  • These spiders are brown and furry.
  • Texas brown tarantulas are one of the tarantulas native to the US.
  • They have an easy-going temperament.
  • Females have been recorded to live more than 30 years.
  • Texas browns can have a leg span of 5-6 inches.

Texas Brown Tarantula Scientific name

The scientific name of the Texas brown tarantula is Aphonopelma hentzi.  There are around 1,000 different tarantula species with 30+ native to the United States. Tarantulas are some of the biggest spiders in North and South America. The Texas browns are sometimes called Oklahoma brown tarantulas or Missouri tarantulas depending on their location.

Texas Brown Tarantula Appearance

The Texas brown tarantula has a stocky build with a large abdomen and carapace. Their bodies are brown, and their eight legs are a bit darker. They have spikey, bristle-like hairs that cover their body called setae. Their bodies can be 2-3 inches with a leg span of 5-6 inches. That is longer than your average cell phone.

In addition to their eight legs, they have two appendages at the front of their bodies called pedipalps. They are used like arms for grasping prey and the males use them during mating. On the front of their head the Texas brown tarantula has a chelicera and eight eyes (ocular tubercle). Their vision is poor, so they rely on sensing movement with their bristly setae.

Texas brown tarantula

The Texas brown tarantula has two appendages called pedipalps, which are used like arms for grasping prey.

Texas Brown Tarantula Behavior

Texas brown tarantulas are easy going and predictable. They spend most of their lives in their burrows, which they either dig or take over from a previous animal. At night they head to the entrance of their burrows and wait for some unsuspecting insect, frog, or cricket to wander by.

If a Texas brown tarantula comes across a large lizard, the tarantula may flick urticating hairs off its abdomen at the predator. These hairs penetrate the skin, which is painful, deterring the lizard from attacking.

These spiders also molt, wiggling their way out of their skin, or exoskeleton, to make room for their growing bodies. During this time, they may refuse to eat, but afterwards they may have a hardy appetite.

Texas Brown Tarantula Habitat

It’s no surprise this spider lives in Texas, but they can also be found in Oklahoma, Missouri, Colorado, Kansas, Arkansas, Louisiana, and New Mexico. They are terrestrial, spending much of their time hidden deep in burrows in the ground. The entrance to their burrows is covered with a white silky web that keeps predators out and can help the tarantula detect movement of approaching threats.

The most common habitat of the Texas brown is arid desert, as they are equipped to deal with the dry climate. They are nocturnal animals that come out at night to look for food, but they’re occasionally out in the early morning or late evening as well. Tarantulas don’t wander far from their burrows; In fact, they usually stay home and wait for food to come to them. You might see more tarantulas in the fall when the males leave their burrows to find a mate. Otherwise, these creatures remain fairly hidden.

Texas Brown Tarantula Predators and Threats

Predators of the Texas brown tarantulas include lizards, snakes, coyotes, birds, and foxes. You may also be aware of tarantula hawks, the biggest wasp in Texas. These wasps are blue with orange wings and can get to be 2 inches long. They are common in much of the southern states of the US. If you have ever been stung by one, you know how painful it is. When they sting a tarantula, they have gruesome plans. The sting doesn’t kill the tarantula but paralyzes it. The wasp will then bury it alive as food for its young. The female lays an egg on the tarantula’s abdomen and when the larvae hatch, the first meal is readily available.

Texas brown tarantulas have a few defense mechanisms including urticating hairs they can flick at a predator. If they feel threatened, they can also try to intimidate a predator by taking a threat pose. When in this posture, they raise up, hiss, and show their fangs. However, they are not overly aggressive and prefer to flee than fight.

What Eats Texas Brown Tarantulas?

Some of the common animals that eat Texas brown tarantulas are tarantula hawks, snakes, lizards, some birds, coyotes, and foxes.

What Do Texas Brown Tarantulas Eat?

They eat insects, crickets, and roaches, but can also eat small lizards and mice. They don’t need to eat very often; In fact, they can go weeks without food, but when they do eat, they do so aggressively. If prey wanders by their burrow, the tarantula will snag it with its front pedipalps and wrap it with a web. It may use its fangs to inject venom that contains digestive juices to help liquefy the prey so it can suck up the nutrients.

What is the Conservation Status of Texas Brown Tarantulas?

Texas brown tarantulas are not listed by the IUCN as a threatened species. They are a common tarantula in most of the southern states in the US.

Reproduction, Babies, and Lifespan

Texas brown tarantulas are solitary animals, but when it comes time to mate, the males leave their burrows. This happens in the late summer or fall, when mass migration of tarantulas can be seen in some areas. These spiders venture off, looking for female tarantulas that are receptive to mating. They latterly knock outside the door of the burrow by tapping their leg on the ground. If the female is ready to mate, she comes out of her burrow and the male spins a sperm web. He deposits his sperm on the web and then uses his pedipalps to insert the sperm into the female.

The females can lay up to 1000 eggs at a time, which they keep in their burrows for safety. She makes an egg sac, which she watches for the next 45-60 days until the spiderlings hatch. Not all of the eggs survive and not all of the spiderlings make it to adulthood, as many are eaten when they venture out on their own. Spiderlings usually leave their mother’s nest a few days after hatching.

The life span of the females is much longer than that of the males. Females can live more than 30 years. Males, on the other hand, usually only live eight to 10 years.

Population

It is difficult to get an accurate count of tarantulas due to the fact that they spend most of their times hidden underground. According to the National Park Service, there are 14 different species of tarantulas in Texas. They are not listed by the IUCN as a threatened species.

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Sources

  1. Tarantula Collective / Accessed October 31, 2022
  2. MDC.mo.gov / Accessed October 31, 2022
  3. Wildlife Department / Accessed October 31, 2022
  4. Tamu.edu / Accessed October 31, 2022
Cindy Rasmussen

About the Author

Cindy Rasmussen

I'm a Wildlife Conservation Author and Journalist, raising awareness about conservation by teaching others about the amazing animals we share the planet with. I graduated from the University of Minnesota-Morris with a degree in Elementary Education and I am a former teacher. When I am not writing I love going to my kids' soccer games, watching movies, taking on DIY projects and running with our giant Labradoodle "Tango".
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Texas Brown Tarantula FAQs (Frequently Asked Questions)

Yes, Texas brown tarantulas are venomous, but they have a mild venom. If you get bitten by one the bite will hurt but it will be similar to a bee sting.