Giant Vinegaroon — Fact Sheet
Mastigoproctus giganteus · Giant Vinegaroon
📋 At a glance
| Adult size | body 4-6 cm, excluding flagellum |
| Lifespan | at least 7 years; often 7-10 in good care |
| Origin | Morelos and nearby central Mexico under the 2018 revision |
| Activity | nocturnal |
| Difficulty | intermediate |
| Legal | CITES: not listed; EU annexes: not listed; import/local arachnid rules may apply |
| Defence | non-venomous; pinches and sprays irritating acetic secretion |
🏠 Enclosure
- One adult: at least 30 x 30 x 30 cm; house alone.
- Secure ventilated lid and cable ports.
- At least 15 cm compactable soil/coir/clay; avoid pure sand, gravel, and fertilizer.
🪨 Enclosure furniture
- Cork bark with a starter burrow beneath it.
- Leaf litter, stable shallow water dish, wetter and drier zones.
- Never open a sealed premolt or brood chamber.
💡 Lighting
- UVB not required.
- Subdued ambient light; 10-12-hour photoperiod.
- Full darkness inside the burrow; no direct sun or focused lamp.
🌡️ Temperature
Upper warm point: 27-28°C
Warm zone: 22-27°C
Cool zone: 20-22°C
Night: 18-23°C
Never heat from beneath; use thermostat control and measure upper substrate.
💧 Humidity & water
- 60-80%; surface partly dry, deep layer slightly moist and cohesive.
- Add water to one corner or down a side; do not flood the chamber.
- Shallow dish always available; retain a humid refuge during seasonal drying.
🪳 Diet
Feed routinely:
- Captive-bred roaches, suitable crickets, beetle larvae, or locust nymphs every 7-10 days.
In moderation:
- Harder prey only if smaller than the animal can safely control.
Avoid:
- Wild arthropods, vertebrate food, oversized prey, and any prey in a sealed burrow.
Supplements:
- None routinely; vary and gut-load feeders.
🩺 Health — warning signs
- Collapsed burrow or persistent surface wandering → wrong substrate, moisture, heat, or lack of a secure retreat.
- Failed molt → unstable moisture, prey, flooding, overheating, or excavation.
- Mites, mold, or odor → remains, saturation, and poor airflow.
- Damaged flagellum/leg → rough capture, door injury, aggressive prey, or cohabitation.
Use a catch cup; protect eyes from the defensive spray and seek medical advice after persistent eye pain.