Widow spiders
Latrodectus is a broadly distributed genus of spiders with several species that are commonly known as the true widows. This group is composed of those often loosely called black widow spiders, brown widow spiders, and similar spiders. However, the... Wikipedia
Lower classifications
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In nature, it is a fairly common spider; most species are found in recesses under rocks, or logs in a woodpile, in crevices or holes in dirt embankments, in ...
Black widows are notorious spiders identified by the colored, hourglass-shaped mark on their abdomens. Several species answer to the name, ...