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Females of a few species are paler brown and some have no bright markings. The bodies of black widow spiders range from 3–10 mm (0.12–0.39 in) in size; some females can measure 13 mm (0.51 in) in their body length (not including legs). [8] Including legs, female adult black widows generally measure 25–38 mm (1–1.5 in). [9] [10]
Latrodectus mactans, known as southern black widow or simply black widow, and the shoe-button spider, [citation needed] is a venomous species of spider in the genus Latrodectus. The females are well known for their distinctive black and red coloring and for the fact that they will occasionally eat their mates after reproduction.
Latrodectus hesperus, the western black widow spider or western widow, is a venomous spider species found in western regions of North America. The female's body is 14–16 mm (1/2 in) in length and is black, often with an hourglass-shaped red mark on the lower abdomen. This "hourglass" mark can be red, yellow, and on rare occasions, white.
Latrodectus mirabilis, sometimes (but rarely) known as black widow is a spider species that is native to most of South America in the genus Latrodectus of the family Theridiidae. Description [ edit ]
Intense pain, muscle stiffness, possible nausea, and vomiting are the telltale signs of a black widow spider bite, and these symptoms will likely occur within a few hours after being bitten ...
Female and male black widow spiders differ in characteristics. Smith and Aggson said female black widows are jet black with a distinct mark that looks like a bright orange or red hourglass on the ...
Download as PDF; Printable version; In other projects ... male. Black widow spider (Latrodectus mactans), female.
Symptoms of a Black Widow bite, according to Orkin, can include: "dull muscle pain throughout the entire body. The bite site later swells and turns red, forming a target-shaped lesion.