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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 yellow, and on rare occasions, white.
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.
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.
“The western black widow, Latrodectus hesperus, lives in the USA west of Kansas, plus in southwestern Canada and western Mexico,” he explains. This female black widow has a solid red hourglass ...
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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Solitaire: Spider Black Widow. A variation of spider solitaire that lets you build without regard to suit. By Masque Publishing
Western black widow (Latrodectus hesperus), male. Black widow spider (Latrodectus mactans), female. Northern black widow (Latrodectus variolus) Latrodectus Walckenaer ...