Big Black Widow Spider (Latrodectus Hesperus)

Big Black Widow Spider (Latrodectus Hesperus)
The three most common black widow spiders in the USA are: the southern black widow (Latrodectus mactans), the western black widow (Latrodectus Hesperus), and the northern black widow (Latrodectus variolus).
All three of these spiders have a very potent venom containing the neurotoxin latrotoxin.
Black Widow Spider: en.wikipedia.org/wiki/Latrode...
From Wiki: Latrodectus is a broadly distributed genus of spiders with several species that, together, are commonly known as true widows. This group is composed of those often loosely called black widow spiders, brown widow spiders, and similar spiders. However, such general "common names" are of limited use, as the diversity of species is much greater. A member of the family Theridiidae, this genus contains 32 species, which include several North American "black widows" (southern black widow Latrodectus mactans, western black widow Latrodectus hesperus, and northern black widow Latrodectus variolus).
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