Ceratogyrus marshalli
Curvedhorn Baboon / Unicorn Baboon - complete care guide
Curvedhorn Baboon / Unicorn Baboon
Temperature
24-28 °C
Target ambient range
Humidity
60-70 %
Substrate / enclosure RH
Adult DLS
13-15 cm
Average - varies per individual
Moult interval
Sling 3-6w - Juv 2-3mo
Adult 9-12mo
Adult cycle = mature females; males never moult again after maturity
About
Backward-curved "unicorn" horn - the only tarantula with this feature. Fossorial, defensive, easy to keep dry.
Husbandry cheat sheet
- Origin
- Zimbabwe, Mozambique
- Habitat
- Dry savanna
- Temperament
- Defensive
- In your collection
- 0
Growth, lifespan & conservation
- Growth rate
- Medium
- Maturity
- ♀ 24mo ♂ 18mo
- Lifespan
- ♀ 12yr ♂ 3yr
- Continent
- Africa
- UK availability
- Commonly available
Care Guide
Ceratogyrus marshalli
Curvedhorn Baboon / Unicorn Baboon - a complete husbandry sheet. Use as a starting point and adjust to your individual specimen.
What size enclosure does a Curvedhorn Baboon / Unicorn Baboon Tarantula need?
Adults
30 × 30 cm footprint with at least 20-30 cm of compacted substrate. Burrowing is obligate - depth is the entire point of the setup.
Slings & Juveniles
Sling vials with 5-8 cm of firmly packed substrate and a starter burrow entrance against the wall. Too much open space stresses burrowers.
To map exact floor space and substrate safety limits for your setup, use our free interactive tarantula enclosure planner.
What temperature and humidity does a Curvedhorn Baboon / Unicorn Baboon Tarantula need?
Heating
Curvedhorn Baboon / The Unicorn Baboon is comfortable at 24-28 °C. Most UK homes sit in or near this range for most of the year; heat the room rather than the enclosure if winter drops below it. For burrowers this matters double: under-tank heating cooks the moist lower substrate column and warps the burrow gradient dangerously.
Humidity
African baboon spiders from savanna-dry habitat: 60-70 %, substrate dry on top with slight dampness deep down. Far drier than Asian fossorials.
Ventilation
Moderate cross-ventilation. Avoid top-vent-only designs that wick moisture out of the substrate column too fast.
What substrate is best for a Curvedhorn Baboon / Unicorn Baboon Tarantula?
Recommended Mixes
Depth
20-30 cm
Notes
Damp enough to hold a tunnel shape when squeezed, never wet. Pack it HARD when filling - a collapsed burrow can trap and kill the spider.
How do you set up a Curvedhorn Baboon / Unicorn Baboon Tarantula enclosure?
Décor
The Hide
The rear-mounted horn (or plug-plate in fawcetti) is used to block the burrow during defence and dry periods - a starter burrow against the glass lets you see this behaviour.
Water
Shallow dish on the surface, always full. Many fossorials plug their burrows for weeks - they drink when they surface, so the dish must be ready.
Lighting
Ambient room light only - fossorials spend most of their lives underground and bright light offers nothing.
How often should you feed a Curvedhorn Baboon / Unicorn Baboon Tarantula?
Good Feeders
Long refusal worrying you? Separate premoult fasting from genuine problems with our "Is my T okay?" checker.
Is my Curvedhorn Baboon / Unicorn Baboon Tarantula dying or moulting?
Pre-moult signs to look for
Refusing food for weeks is normal before a moult - a healthy Curvedhorn Baboon / Unicorn Baboon Tarantula fasting is almost never an emergency in itself. Watch for slowing down and spending more time in the hide, sealing the burrow entrance with silk (a sealed door usually means "do not disturb - moulting in progress"), laying a thick moult mat of web on the floor. Old World species do not flick urticating hairs, so there is no bald patch to watch - rely on fasting, lethargy and hide time instead.
On its back is MOULTING, not dying
A Curvedhorn Baboon / Unicorn Baboon Tarantula lying upside down or on its side with legs curled inwards is almost certainly mid-moult. Do not touch it, do not right it, do not mist it - just remove any live prey (crickets can kill a defenceless moulter) and leave the room.
How long between moults?
For this species, expect a moult roughly every 21-42 days for spiderlings, every 60-90 days for juveniles, and every 165-234 days for sub-adults, with adult females moulting around every 9.2 months (up to 11.9 months at the extreme). Males never moult again after their ultimate (mature) moult.
After the moult: fang hardening time
The new exoskeleton stays soft, with fangs that cannot grip, for roughly 7 days in this species. Offer no food and no handling for about 7 days - feeding too early is how fresh moulters get injured. The shed exuvium is also the best sexing tool there is - see our tarantula sexing guide for what to look for.
Genuinely worried about behaviour that is not moulting? Our "Is my T okay?" triage tool walks the danger signs one by one.
What ongoing care does a Curvedhorn Baboon / Unicorn Baboon Tarantula need?
🪞 Moulting
Fossorials moult underground and often seal the burrow for days or weeks beforehand. A sealed spider is usually a fine spider - never dig one out. Remove prey from the entrance and wait. Adult intervals apply to mature females - males never moult after their ultimate moult.
🧹 Cleaning
Spot clean the surface only. Never excavate to clean - destroying a burrow network is a serious setback and stress event.
✋ Handling
African baboon temperament: fast, defensive, potent. The horn does not make them friendly. Display only.
What are the most common mistakes when keeping Curvedhorn Baboon / Unicorn Baboon Tarantulas?
✓ What They Love
- Deep, firmly packed, slightly damp substrate
- Starter burrow against the side glass
- Stable temperatures
- Patience - sealed burrows are normal, sometimes for weeks
✕ Common Mistakes
- Shallow substrate
- Digging them up to "check on them"
- Heat mat underneath
- Loose, dry substrate that collapses
Keep exploring: related care guides
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