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The southern widow is primarily found in (and is indigenous to) the southeastern United States, ranging as far north as Ohio and as far west as Texas. [9] The northern black widow (L. variolus) is found primarily in the middle Atlantic states, though its range overlaps with that of L. mactans.
In the United States each year, about 2,500 [31] people report being bitten by a black widow, but most do not need medical treatment. Some bites have no venom injected—a "dry" bite. In the United States, no deaths due to black widows have been reported to the American Association of Poison Control Centers since 1983. [32]
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.
The widow spiders (genus Latrodectus), such as the black widow, redback spider, and katipō are spiders that carry a neurotoxic venom [18] which can cause a set of symptoms known as Latrodectism. Widow spiders are large, shiny house spiders with relatively spindly legs and deep, globular abdomens.
Conversely, redback and North American black widows live in proximity with people and several hundred black widow bites are reported to Poison Control in the United States each year. Of the bites reported in the United States from 2001 to 2005, approximately 31% were treated in a health care facility, 0.5% had major complications, and none were ...
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Latrodectus variolus, the northern black widow spider or northern widow, is a venomous species of spider in the genus Latrodectus of the family Theridiidae. The population is closely related to the southern black widow, Latrodectus mactans , and the western black widow, Latrodectus hesperus , of the genus.
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