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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 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 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.
Black widows, once L.A.’s ruling widow, have been pushed out of the urban core by the brown widow over the last 15 years or so, according to Gonzalez. Native black widows are still doing well on ...
The black widow’s venom attacks human nerve cells, and potentially can be dangerous to people — especially small children and older adults with preexisting health conditions.
Another bird which winters in California is the American white pelican which is a large seabird, with a wingspan reaching up to 9 feet 2 inches (280 cm). Venomous spiders in California include Arizona recluse, Baja recluse, Chilean recluse, desert recluse, Martha's recluse, Russell's recluse, brown widow, and western black widow. [5]
Like the black widow species in the United States, L. geometricus has a prominent hourglass-shaped marking on the underside of the abdomen; the brown widow's hourglass, however, is usually a vivid orange or a yellowish color. Unlike the black widow, L. geometricus has a black-and-white geometric pattern on the dorsal side of its abdomen. They ...
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.