Asian Forest Scorpion Care Guide (2026)
Asian Forest Scorpions (Heterometrus spp.) are large, widely available tropical forest scorpions that are frequently compared to Emperor Scorpions. They share similar care requirements — high humidity, deep moisture-retentive substrate, and warm temperatures — but differ meaningfully in temperament. Asian Forest Scorpions are generally more defensive and faster-moving than Emperors, which affects how they're handled and how appropriate they are for new keepers.
Quick Stats
- Scientific name: Heterometrus spp. (multiple species commonly sold under this name)
- Adult size: 4–7 inches depending on species
- Lifespan: 5–8 years in captivity
- Enclosure (adult): 10–20 gallon equivalent; floor space prioritized over height
- Temperature: 75–85°F
- Humidity: 75–85%
- Substrate: 4–6+ inches coconut fiber or coco-based mix
- Diet: Appropriately sized live or pre-killed insects
- Difficulty: Beginner to intermediate
- Venom: Generally regarded as relatively low in medical significance; stings can be painful and individual reactions vary; consult a physician if you have venom allergies
A Note on Species Identification
Heterometrus is a large genus with many species across South and Southeast Asia. Animals sold in the hobby as "Asian Forest Scorpion" may represent several different species — H. spinifer, H. longimanus, H. laoticus, and others are all commonly encountered. Care requirements are broadly similar across the genus, but exact species identification is often uncertain at point of sale. If species identity matters to you, source from a specialist breeder who can confirm the animal's origin.
How Asian Forest Scorpions Differ from Emperor Scorpions
Asian Forest Scorpions and Emperor Scorpions are frequently confused and often compared. Key differences:
- Temperament: Asian Forest Scorpions are generally more defensive, faster-moving, and quicker to sting than Emperor Scorpions. They are less appropriate for handling and require more caution during enclosure maintenance.
- Humidity: Asian Forest Scorpions typically require slightly higher humidity than Emperors — 75–85% vs 70–80%.
- Availability: Heterometrus species are widely available in the trade and often less expensive than true P. imperator.
- Appearance: Appearance varies by species, and visual identification can be difficult; provenance or breeder identification is more reliable than appearance alone.
See the Emperor vs Asian Forest Scorpion Guide for a full side-by-side comparison.
Enclosure
Asian Forest Scorpions are terrestrial burrowers. Floor space matters more than height. A 10–20 gallon equivalent enclosure is appropriate for a single adult. The enclosure must have a secure, tight-fitting lid — Asian Forest Scorpions are fast and can exploit gaps, silicone seams, and furnishings to escape.
Front-opening enclosures are preferred for ease of maintenance. Adequate ventilation is essential — high humidity combined with poor airflow leads to mold and substrate degradation.
→ Best Tarantula & Invertebrate Enclosures | Scorpion Enclosure Size Guide
Substrate
Deep, moisture-retentive substrate is essential. Asian Forest Scorpions burrow extensively and require substrate that holds burrow structure and maintains high ambient humidity.
- Depth: 4–6+ inches minimum
- Composition: Coconut fiber (coir) is the most widely recommended base — alone or mixed with organic topsoil, sphagnum moss, or similar materials. The substrate should be damp enough to hold a burrow but not waterlogged.
- Avoid: Dry substrates, sand, or anything that doesn't retain moisture
→ Best Coconut Fiber Substrate | Best Tarantula & Invertebrate Substrate
Temperature
Asian Forest Scorpions thrive at 75–85°F. Many homes fall within this range without supplemental heating. If ambient temperatures drop below 75°F, a low-wattage heat mat on the side of the enclosure (not underneath) is appropriate. All heat sources must be thermostat-controlled.
→ Best Reptile Thermostats | Best Invertebrate Thermometers
Humidity
Asian Forest Scorpions require high humidity — 75–85% is the target range. Maintain by keeping part of the substrate consistently damp, providing a shallow water dish, and misting one side of the enclosure periodically as needed. Monitor with a hygrometer at substrate level. Adequate ventilation is equally important — high humidity with poor airflow leads to mold, mite issues, and substrate degradation.
→ Best Invertebrate Water Dishes
Feeding
Asian Forest Scorpions eat appropriately sized live or pre-killed insects. Crickets and dubia roaches are the most commonly used feeders. Prey should be no larger than the scorpion's carapace. Remove uneaten prey within 24 hours.
- Adults: every 1–2 weeks
- Juveniles: every 5–7 days
See the Scorpion Feeding Guide and Scorpion Not Eating for more detail.
Water
Provide a shallow water dish at all times. Keep it clean and refill regularly. The dish should be shallow enough that the scorpion cannot drown.
Hides
Provide at least one surface hide in addition to allowing burrowing. Cork bark flats, half-logs, and flat rocks are appropriate. Asian Forest Scorpions are secretive and spend most of their time hidden or burrowed.
→ Best Cork Bark for Invertebrates
Handling
Asian Forest Scorpions are more defensive and faster-moving than Emperor Scorpions and are not generally recommended as handling animals. They are capable of stinging quickly and with little warning. Routine transfers should be done with a catch cup rather than direct contact. See the Scorpion Handling Guide.
Molting
Pre-molt signs include food refusal, reduced activity, and burrowing. Do not disturb a molting scorpion and remove all live prey. A freshly molted Asian Forest Scorpion is soft and vulnerable. See the Scorpion Molting Guide.
Common Health Issues
- Dehydration — shriveled appearance, difficulty molting; correct humidity and ensure water access
- Molting problems — usually caused by low humidity or live prey left during molt
- Mold, mites, and substrate issues — caused by poor ventilation with excessive moisture; improve airflow and replace affected substrate
- Prey injury — remove uneaten prey within 24 hours
See Common Scorpion Health Problems for full guidance.