brown widow

spider

Also known as: Latrodectus geometricus

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Last updated

June 22, 2026

Quick Summary

The brown widow spider (Latrodectus geometricus) is an invasive species thought to have originated in Africa. While its venom is considered twice as potent as that of the black widow, the brown widow is not aggressive and injects only a small amount of venom when it bites. Brown widow populations have been found in various regions, including southern California, the Caribbean, the U.S. Gulf Coast, Japan, South Africa, Madagascar, Australia, and Cyprus. They inhabit areas such as buildings, old tires, under automobiles, and among shrubs. The spider's coloration ranges from tan to nearly black, and some individuals display ornate markings on their abdomens. Unlike other widow spiders, the brown widow has an orange hourglass marking on its underside.12

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black widow
Major species
bishopi), and brown widow (L. geometricus), an invasive species. In the northern part of its range, L. mactans is found most often in brush piles and near dwellings. In the southeastern United States, however, it lives on the ground. L. hesperus is found in western North America.
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bishopi), and brown widow (L. geometricus), an invasive species. In the northern part of its range, L. mactans is found most often in brush piles and near dwellings. In the southeastern United States, however, it lives on the ground. L. hesperus is found in western North America.
Read More