Western Black Widow
Latrodectus hesperus
Latrodectus • Theridiidae
Overview
A true black widow — keep ONLY with full respect for its MEDICALLY SIGNIFICANT venom (latrodectism). Not a beginner or handleable animal: use a very secure, escape-proof enclosure and never free-handle. Builds a strong irregular cobweb in upper corners; wants warm (70-85°F), fairly dry (40-60%) conditions and appropriately sized prey. Hardy and long-lived for a true spider, and a dramatic display species for experienced, cautious keepers. Know your local regulations and have a plan before keeping.
Husbandry Requirements
Temperature & Humidity
Temperature
70-85°F
Humidity
40-60%
Enclosure Sizes
Substrate
Feeding Schedule
Prey size: appropriately sized crickets / flies
Quick Stats
Type
cobweb (terrestrial)
Adult Size
female body ~0.3-0.5 in
Growth Rate
medium
Native Region
western North America
Temperament
shy but defensive; medically significant venom
Behavior
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