RecoveryInvertebrates
Orange Baboon tarantula (OBT) care guide
Pterinochilus murinus
Floor space first. Adults want roughly three leg spans of length and no more than about 1.5 leg spans of fall height — a heavy-bodied terrestrial that falls can rupture its abdomen.
Terrestrial — floor space first
Orange Baboon tarantula (OBT) enclosure size
Terrestrial — floor space first. An adult orange baboon tarantula (obt) should live in at least 10" L × 8" W × 6" H; we build toward 15" L × 10" W × 8" H (1.3 × 0.8 × 0.7 ft, roughly 1 sq ft of floor and about a 5-gallon glass equivalent).
Fill the extra height with substrate rather than air — height is fall risk, not enrichment.
- Spiderling / sling
- 3" L × 3" W × 4" H recommended · min 2" L × 2" W × 3" H
- Juvenile
- 8" L × 6" W × 6" H recommended · min 6" L × 4" W × 5" H
- Adult
- 15" L × 10" W × 8" H recommended · min 10" L × 8" W × 6" H
Temperature and heating
Heat the room, not the enclosure. If the room drops below 68 °F use a thermostatted space heater or a heat mat on the outside of a side wall (never under the substrate) — heat mats under a burrow cook the animal.
- Basking / warm surface
- None — no basking site, no heat lamp
- Warm side (ambient)
- 72–80 °F ambient room temperature
- Cool side (ambient)
- 70–75 °F ambient room temperature
- Night
- Room temperature; a 5–8 °F night drop is fine
Lighting and UVB
UVB: None — invertebrates need no UVB and bright light stresses them. Run lights on a Ambient room light on a normal day/night cycle; keep the enclosure out of direct sun photoperiod, on a timer, and replace UVB bulbs on the manufacturer's schedule even while they still emit visible light.
Humidity
Target 40–55% ambient. Keep the substrate bone dry and offer a full water dish; overflow it only if the species tolerates a damp corner.
Substrate and depth
Coco fibre / topsoil blend, packed firm. Depth: 3–5 in — deep enough to dig a starter burrow.
- Ventilation: Cross-ventilation through side vents. Stagnant air plus damp substrate is what actually kills tarantulas — mold and mycosis, not low humidity.
Enclosure tips and furnishing
- Cork bark hide laid on its side at the substrate line
- Shallow water dish (adults) or an overflowed corner (slings)
- Sphagnum moss on the damp corner
- Fake plants to break up sight lines
Build list
- Front-opening acrylic terrestrial enclosure — Front access means you never reach down over the animal, which is what triggers a threat pose.
- Coco fibre / topsoil substrate, 20 qt — Holds a burrow, holds moisture where you want it and doesn't mold like bark chips.
- Digital thermometer / hygrometer — Inverts are kept at room temperature — you need to know what the room actually does, not guess.
- Long feeding tongs and a catch cup — Every interaction — feeding, water top-ups, rehousing — should happen without your hand near the animal.
Orange Baboon tarantula (OBT) FAQ
How big should an adult Orange Baboon tarantula (OBT) enclosure be?
At least 10" L × 8" W × 6" H, and we recommend building to 15" L × 10" W × 8" H — about 1.3 × 0.8 × 0.7 ft, or a 5-gallon glass equivalent. Terrestrial — floor space first.
What temperatures does a Orange Baboon tarantula (OBT) need?
Basking or warm surface None — no basking site, no heat lamp, warm side 72–80 °F ambient room temperature, cool side 70–75 °F ambient room temperature, night Room temperature; a 5–8 °F night drop is fine. Heat the room, not the enclosure. If the room drops below 68 °F use a thermostatted space heater or a heat mat on the outside of a side wall (never under the substrate) — heat mats under a burrow cook the animal.
Does a Orange Baboon tarantula (OBT) need UVB?
None — invertebrates need no UVB and bright light stresses them. Photoperiod: Ambient room light on a normal day/night cycle; keep the enclosure out of direct sun.
What humidity does a Orange Baboon tarantula (OBT) need?
40–55% ambient. Keep the substrate bone dry and offer a full water dish; overflow it only if the species tolerates a damp corner.
What substrate is best for a Orange Baboon tarantula (OBT)?
Coco fibre / topsoil blend, packed firm, at a depth of 3–5 in — deep enough to dig a starter burrow.
How big does a Orange Baboon tarantula (OBT) enclosure need to be for a hatchling?
Spiderling / sling: 3" L × 3" W × 4" H recommended, minimum 2" L × 2" W × 3" H. Scale up to the adult footprint as the animal grows.
Is there anything to be careful about when keeping a Orange Baboon tarantula (OBT)?
Old World species: no urticating setae, fast, defensive and medically significant venom. Bite-safe protocol only — catch cups, long tongs, never free-handle.
How much ventilation does a Orange Baboon tarantula (OBT) enclosure need?
Cross-ventilation through side vents. Stagnant air plus damp substrate is what actually kills tarantulas — mold and mycosis, not low humidity.
Sources
Put this guide to work
Apply these targets to your own orange baboon tarantula (obt) record, then log feedings, sheds and weights against them.