Latrodectus hesperus (Western Black Widow) SAF/AF

Latrodectus hesperus (Western Black Widow) SAF/AF

The Western Black Widow is the iconic silhouette of the American West. A Sub-Adult Female (SAF) or Adult Female (AF) represents this species in its most striking form: a jet-black, porcelain-like predator with a formidable reputation. Despite the myths, they are shy, stationary weavers that make for fascinating, low-maintenance display animals for responsible keepers.

Key Highlights

• The Hourglass: The most famous marking in the animal kingdom. On an adult female L. hesperus, this is a bright, blood-red hourglass located on the underside (venter) of the abdomen.

• The “Lacquered” Look: Adult females possess a high-gloss, ebony finish that looks almost like polished glass. At the sub-adult stage, you may still see faint traces of their juvenile “racing stripes” (creamy white or tan markings) on the top of the abdomen, which typically disappear after the final molt.

• Structural Silk: They produce some of the strongest silk in the world. Unlike the geometric circles of orb weavers, the Widow builds a “tangle web”—a chaotic-looking but highly engineered 3D mesh designed to snag heavy ground-dwelling insects.

• Potent Venom: This is a medically significant species. Their neurotoxic venom is designed to liquefy insect prey, and while a bite is rarely fatal to healthy humans, it is extremely painful. They are strictly “hands-off” and require focused handling protocols.

Quick Care Stats