Aphonopelma hentzi
Oklahoma Brown Tarantula (Texas Brown Tarantula): Advanced Care Guide
Keeper Snapshot: One of the most common, most collected wild tarantulas on the US Great Plains: sturdy, docile, and famous for the fall mating-season migrations when males wander roads by the hundreds. About as beginner-friendly as tarantulas get.
Group: TarantulasDifficulty: Spice 2: BeginnerSetup: Terrestrial burrower, simple beginner setupHandling: Not recommended, kicks urticating hairs
Use This Guide Safely
- Confirm the exact animal. Match this guide to the species, locality, size, and life stage on your label. If the ID is uncertain, use the more conservative part of the range and ask before changing the setup.
- Change one thing at a time. Treat temperature and humidity as target zones, then watch posture, burrowing, drinking, feeding, and molt behavior before making another adjustment.
- Respect the handling boundary. If the guide says no handling, fast, defensive, or medically significant, plan transfers with catch cups, locked lids, and no bare hands. For serious bites, stings, or symptoms, seek emergency medical care.
Quick Snapshot
| Temperature | 70-82°F |
|---|---|
| Humidity | 40-55%, generously ventilated; dry substrate, shallow dish |
| Setup Type | Terrestrial burrower, simple beginner setup |
| Substrate | Dry-leaning coco/soil mix, 4-6 in deep with a starter hide |
| Feeding | Juveniles 2x weekly, adults every 1-2 weeks, at dusk |
| Care Difficulty | Spice 2: Beginner |
| Handling | Not recommended, kicks urticating hairs |
Humidity zones: Very Low under 30% - Low 30-60% - Low-Moderate 40-70% - Moderate 60-80% - Moderate-High 70-85% - High 80%+ - Very High 90%+
Enclosure Format / Size Class
- Sling/juvenile: burrow setup sized to the animal.
- Adult (4-5.5 in leg span): terrestrial enclosure with 4-6 in dig depth.
Warnings First
- Kicks urticating hairs before any bite; the hairs, not the bite, are the real irritation risk to skin and eyes.
- The bite itself is mild, not dangerous.
- A 20-25 year animal spends its first years small. Keep pebbles in the water dish that whole stretch so a juvenile cannot drown.
- Extremely slow growing and long-lived; females can live 20-25+ years.
Simple Care
- Give a simple hide and 4-6 in of substrate for a burrow start; this species digs but does not need elaborate tunnels.
- Keep mostly dry with a shallow water dish; damp substrate causes more problems than under-watering.
- Put pebbles in the water dish so slings cannot drown.
- Vents low on two opposite walls so air crosses the floor and under the hide, not just the lid space.
- Feed appropriately sized roaches or crickets; adults can skip meals for weeks without concern.
- Avoid unnecessary handling. A tarantula kicking urticating hairs is telling you to back off.
Advanced Keeper Notes
Enclosure & Microclimate
- An opportunistic burrower rather than an obligate one; a hide plus loose substrate is usually enough, though it will dig given the depth.
- Ventilation should be generous and placed low as well as plentiful: vents on two opposite walls at or just above the substrate, so air crosses the floor and moves under the hide.
- More airflow is always better here. Ambient sits at 40-55% on its own and dropping lower is fine; it hydrates from the dish, not the air.
- Judge by hand rather than by gauge. Substrate should read dry from surface to burrow depth except right around the dish.
- Keep the shallow dish full with pebbles or coarse grit so the waterline sits below the rim; with 20-plus year lifespans, a small juvenile can drown in it for years.
Feeding, Growth & Maintenance
- Crickets or roaches no larger than the tarantula's body length: roughly 1/4-3/8 in for juveniles, 3/4-1 in for adults. Offer in the evening.
- Juveniles take prey twice weekly, adults do fine every 1-2 weeks; weeks-long fasts (especially premolt or post-breeding for wild-caught males) are normal.
- Remove uneaten prey within a day or two. Stop feeding at the first signs of premolt (dark, dull abdomen, reduced appetite) until days after the new exoskeleton hardens.
Possible Origin / Range
- Likely native range: Great Plains and south-central United States, especially Texas and Oklahoma, in dry grassland and scrubland burrows.
- Habitat translation: A simple, dry-leaning terrestrial setup with a starter hide and digging depth. Genuinely low-effort for an experienced or first-time tarantula keeper.
Advanced Keeper Details
- Females mature slowly (8-10+ years) and molt once a year or less as adults; males mature faster (3-5 years) but live only 1-2 years after their final molt.
- Famous for autumn migrations across Texas and Oklahoma, when mature males leave their burrows en masse to cross roads looking for females.
- Wild-caught adult males in the trade were usually caught during that migration and are near the end of their lifespan: a different commitment than a captive-bred juvenile female.
- Urticating hairs, flicked from the abdomen with the hind legs, are the main defense; repeated exposure can sensitize skin and eyes, so avoid leaning over an agitated animal.