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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 red, yellow, and on rare occasions, white.
The blue mud dauber species, Chalybion californicum, is a wasp that, in western North America, is the primary predator of black widow spiders. [ 21 ] The ultimate tensile strength and other physical properties of Latrodectus hesperus (western black widow) silk are similar to the properties of silk from orb-weaving spiders that had been tested ...
Latrodectism (/ l æ t r ə ˈ d ɛ k t ɪ z əm /) is the illness caused by the bite of Latrodectus spiders (the black widow spider and related species). Pain, muscle rigidity, vomiting, and sweating are the symptoms of latrodectism.
“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 ...
The black widow’s venom can be dangerous to people — especially small children and older adults with preexisting health conditions. ... southern and western varieties most commonly found in ...
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.
Western black widow (Latrodectus hesperus), male. Black widow spider (Latrodectus mactans), female. Northern black widow (Latrodectus variolus) Latrodectus Walckenaer ...
The latest installation of the Marvel Cinematic Universe, "Black Widow" is a superhero spy thriller that's due out in theaters and on Disney+ with Premier Access on July 9. For fans of the ...