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Orange Baboon Tarantula
Pterinochilus murinus
The Orange Demon of Africa (OBT). Arguably the most terrifying, aggressive, and lightning-fast tarantula kept in the worldwide hobby. It flaunts a hypnotic, fluorescent orange hue, but delivers a clinically significant bite that causes excruciating, radiating muscle cramps. It constructs monstrously massive tubular web castles and will attack (while loudly hissing) absolutely anything that gets near—even spilled water.
Class:Arachnida
Order:Araneae
Family:Theraphosidae
Genus:Pterinochilus
Species:Pterinochilus murinus
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Environment
Terrestrial
Humidity
40 - 60 %
Day temperature
24 - 29 °C
Night temperature
20 - 24 °C
UVB
None
Species description
Geographical Origin and Habitat: Arid scrublands, dry savannas, and harsh desert-bordering plains of Eastern and Southern Africa (Angola, Zambia, Zimbabwe). A brutal survivor of the dark continent, uniquely adapted to thrive in punishing, bone-dry climates by cunningly hiding in deeply excavated burrows underneath the massive root systems of acacia bushes or fallen timber.
Taxonomy and Genetics: Theraphosidae family. It belongs to the deeply feared group of 'Old World' tarantulas (Africa/Asia). Unlike their slower, milder American (New World) cousins, it DOES NOT possess urticating (itching) hairs to flick at predators. To compensate evolutionarily, nature gifted it with explosive blind aggression, massive one-inch (2 cm) fangs, and a highly potent neurotoxic venom capable of dropping large rodents, snakes, and heavily deterring hungry baboons from digging it up.
Behavior and Habits: PURE NEUROSIS AND SPEED. Infamously renamed in the hobby community as the 'OBT' (Orange Bitey Thing). It is definitively the most irascible spider on the market. If you merely touch or breathe on the lid of its enclosure, it will not flee; instead, it rears straight up backward into a threat posture (showing huge black fangs), emits a hollow hissing sound (Stridulation) by rubbing its front legs together, and then launches itself into a blindingly fast, teleport-like strike, biting feeding tongs, gloves, or the glass wall repeatedly.
Morphology: Medium-sized, reaching a 5.5 to 6-inch (13-15 cm) leg span. Its coloration (in the highly sought-after RCF - Red Color Form) is a blindingly bright, almost radioactive neon orange, featuring a dark, starburst-shaped carapace marking carved in deep ebony black. The legs are thick and densely haired. Females are stocky and live up to 15 years; males, incredibly spindly, long-legged, and faded in color, completely stop eating and die aimlessly wandering about 6 months after their ultimate 'hooking out' maturity molt (living roughly 3 years max).
Care, breeding and tankmates
Terrarium Setup: AN ARID WEB FORTRESS. It is a semi-fossorial / opportunistic heavy webber that produces pounds of the strongest, thickest silk in nature. It must be housed in a secure enclosure (at least 12x12 inches / 30x30 cm floor space) packed with at least 6 inches (15 cm) of bone-dry coco peat and an angled cork bark slab. Within 48 hours, it will completely fill the entire upper volume of the tank with suspended galleries of dense, opaque, blindingly white webbing, creating dozens of funnel-shaped tunnels connecting to an underground lair.
Lighting and Heating: Intensely photophobic (hates bright light). Requires medium-high ambient room temperatures, around 78-82°F (25-28°C) for optimal lightning-fast metabolism, dropping to 72°F (22°C) at night, provided exclusively by a space heater or a very weak side-mounted heat mat. NEVER use heat lamps or focal lights: they do not bask to thermoregulate, and the merciless heat/light combo will force the stressed spider to bury itself alive, sealing its burrow with thick web to die of desiccation.
Humidity and Hydration: EXTREME ARIDITY AND WATER BOWL WARS. You must never mist or spray a baboon spider enclosure. They suffer lethally from high humidity and the stuffy, stagnant air of tropical setups, quickly dying from parasitic mite infestations in their book-lungs. Keep the substrate desert-dry. Provide only a wide, shallow water dish kept ALWAYS full of fresh water. BUT BE WARNED: the furious OBT will often literally attack the water as you pour it in (splashing itself), or aggressively fill the bowl with dirt and thick webbing purely out of spite, forcing you to fight it to retrieve and clean the bowl using 12-inch metal tweezers.
Feeding and Supplementation: INSATIABLE KILLING MACHINE. It hunts absolutely anything vibrating the trip-wires of its web fortress with unprecedented violence (often called 'teleporting'). Large crickets, massive locusts, and roaches (Dubia, Red Runner) will be snatched and violently dragged kicking into the dark silk funnels in a fraction of a second, to be liquefied with digestive venom and sucked dry (Exo-digestion). Offer a heavy meal once or twice a week.
Compatibility: Monstrously territorial and utterly intolerant. Strictly housed singly. Males attempting to approach a female's web castle for breeding risk their lives with every step, and in 90% of cases are brutally ambushed and devoured alive at the first miscalculation of the matriarch's giant web.
Health and Common Diseases: Venomous Bite (Extreme Danger to Keeper!): Its venom is a pure, violent neurotoxin. While not medically lethal to a healthy human adult without allergies, a bite causes inhumane, radiating, throbbing pain lasting for days, severe high fevers, massive localized swelling, and severe muscle cramps radiating to the chest and heart (African Tarantism Syndrome). Fatal Dehydration in Slings: tiny spiderlings would die in the actual desert; in the terrarium, their microscopic book-lungs require one corner of the dirt to be kept slightly damp with a few drops to drink, but too much moisture will cause their delicate legs to rot off.
Geographic Origin and Distribution
Arid scrublands, dry savannas, and harsh desert-bordering plains of Eastern and Southern Africa (Angola, Zambia, Zimbabwe). A brutal survivor of the dark continent, uniquely adapted to thrive in punishing, bone-dry climates by cunningly hiding in deeply excavated burrows underneath the massive root systems of acacia bushes or fallen timber.
Origin
Selective breeding and cultivarsAfrica and MadagascarCosmopolitan or introduced
Terrestrial invertebrate profile
- Diet
- No verified data available
- Life expectancy
- No verified data available
- Adult size
- 15 cm
- Lifestyle/Microhabitat
- No verified data available
- Activity cycle
- No verified data available
- Sociality
- No verified data available
- Reproduction
- No verified data available
- Venom level
- No verified data available
- Handling tolerance
- No verified data available
- Brumation
- No verified data available
- Molting
- No verified data available
The catalog's scalar value is 15 cm. The Herpeton Academy — Pterinochilus murinus source reports a maximum adult measurement of 15 cm for this species, recorded as diagonal leg span (DLS). The taxonomic record consulted is Pterinochilus murinus. These figures are not interchangeable: the first is the profile's editorial reference, whereas the second is a published maximum under a specific measurement convention; differences among sources can reflect sex, population, life stage and measuring method.
Image gallery
Licensed images linked to the species or, when marked, to the closest representative taxon.
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