Lesser Brown Scorpion

Isometrus maculatus

ScorpionintermediateVenom: MildCommunal OK

Venom note

Mild — venom is not fatal to humans and a sting is compared to a bee, with mild, self-limiting effects. Non-aggressive; stings only when threatened. No handling.

About

A slim, long-tailed tropical bark scorpion that has spread around the world, often living on and around buildings. It's a climber that wants vertical cork bark to scale, hide behind, and molt on rather than deep substrate. Keep it warm with a half-humid/half-dry enclosure — adults tolerate drier conditions, young need more moisture — and a water dish. Communal-tolerant if well fed. Venom is mild (bee-sting class) and it's non-aggressive, but its speed and climbing put it just past beginner; kept hands-off.

Taxonomy

FamilyButhidae

GenusIsometrus

Native regionPantropical (originally Indo-Pacific, now spread worldwide)

TypeScansorial

Temperamentsecretive, non-aggressive; stings only if disturbed

Size & growth

Adult size1.5-3 inches

Length30.00–75.00 mm

Growth rateslow

Climate

Temperature75–88 °F

Humidity50–70%

Enclosure

Adult size10-20 gal; deep substrate or rock stacks per type

Substratehalf-humid/half-dry setup with vertical cork bark to climb, hide, and molt on; water dish

Substrate depth2 inches

Water dishRequired

Feeding

Feeding modePredator (live prey)

Prey sizecrickets, roaches

Adult cadence1 prey every 1-2 weeks

Times kept: 0