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Asian Forest Scorpion
Heterometrus spinifer
Often confused with the Emperor scorpion, the Asian Forest Scorpion is a spectacular, glossy jet-black giant. It is faster, more defensive, and more active than the Emperor, requiring high humidity and a deep substrate for burrowing.
Class:Arachnida
Order:Scorpiones
Family:Scorpionidae
Subfamily:Heterometrinae
Genus:Heterometrus
Species:Heterometrus spinifer
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Environment
Terrestrial
Humidity
70 - 80 %
Day temperature
22 - 32 °C
Night temperature
21 - 24 °C
UVB
None
Species description
Geographical Origin and Habitat: Native to the warm, humid primary rainforests of Southeast Asia, including Malaysia, Thailand, and Cambodia. They are terrestrial burrowers that live under the forest floor litter and log piles, excavating deep burrows in damp clay soil to protect themselves from predators and the tropical sun.
Taxonomy and Genetics: Classified within the Scorpionidae family, *Heterometrus spinifer* is a large scorpion species that fluoresces under ultraviolet light. It is commonly kept in captivity due to its striking appearance and relatively simple care requirements.
Behavior and Habits: Decidedly more defensive and active than the Emperor scorpion. When disturbed, they quickly raise their claws and curve their tail (telson) over their back in a strike posture. Their venom is mild, with a toxicity comparable to a wasp sting, and they rely primarily on the crushing power of their powerful claws for defense.
Morphology: A large species reaching lengths of 15-16 cm, displaying a glossy, pitch-black coloration. While similar in appearance to the Emperor scorpion (*Pandinus imperator*), *Heterometrus spinifer* has more slender, elongated, and smoother pedipalps (claws) that lack the heavy, rough granulations of the Emperor. Sexual dimorphism can be identified by examining the ventral side; males have longer pectines with a higher number of teeth compared to females.
Care, breeding and tankmates
Terrarium Setup: A horizontal enclosure measuring at least 45x45x30 cm is ideal for a single adult. Provide a deep substrate (10-15 cm) composed of organic topsoil, coconut coir, and peat moss to allow for natural burrowing. Place pieces of cork bark or hollow wood half-buried in the substrate to serve as secure hides.
Lighting and Heating: Maintain a temperature range of 24-28°C. Use a heat mat attached to the side of the terrarium (never on the bottom, as scorpions burrow to escape heat) regulated by a thermostat. Minimal lighting is required, as they are nocturnal. Avoid exposing them to continuous UV light, as it can cause stress.
Humidity and Hydration: They require high relative humidity (75-85%). Mist the enclosure regularly and pour water into a corner of the substrate to keep the lower layers damp but not waterlogged. A shallow water dish must be provided at all times; they drink regularly and require a safe exit ramp to prevent drowning.
Feeding and Supplementation: Voracious predators. Feed them 1-2 large insects per week, such as crickets, roaches, or grasshoppers. Do not overfeed; if the abdomen looks overly swollen, reduce feeding. Never leave live insects in the enclosure when the scorpion is molting, as they are highly vulnerable.
Compatibility: Unlike the social Emperor scorpion, *Heterometrus spinifer* is highly territorial and generally solitary. Co-housing is not recommended due to a high risk of aggression and cannibalism. They should never be housed with other species.
Health and Common Diseases: High humidity is critical; low levels will cause dehydration and fatal complications during molting (dysecdysis). Ensure adequate ventilation to prevent mold and fungal outbreaks on the exoskeleton. Avoid handling them, as their pincers have immense mechanical crushing strength and can cause painful wounds.
Geographic Origin and Distribution
Native to the warm, humid primary rainforests of Southeast Asia, including Malaysia, Thailand, and Cambodia. They are terrestrial burrowers that live under the forest floor litter and log piles, excavating deep burrows in damp clay soil to protect themselves from predators and the tropical sun.
Origin
South and Southeast Asia
Terrestrial invertebrate profile
- Diet
- No verified data available
- Life expectancy
- No verified data available
- Adult size
- No verified data available
- 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
Image gallery
Licensed images linked to the species or, when marked, to the closest representative taxon.
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