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en.wikipedia.org/wiki/Latrodectus

Latrodectus is a genus of spiders in the family Theridiidae, most of which are commonly known ... The bodies of black widow spiders range from 3–10 millimetres (0.12–0.39 in) in size; some females can measure 13 millimetres ( 0.51 in) in their ...

en.wikipedia.org/wiki/Latrodectus_mactans

Latrodectus mactans, known as southern black widow or simply black widow, and the shoe-button spider, is a highly venomous species of spider in the genus  ...

www.desertusa.com/insects/black-widow-spider.html

The black widow spider is considered the most venomous spider in North America.

www.nationalgeographic.com/animals/invertebrates/group/black-widow-spiders

Black widows are notorious spiders identified by the colored, hourglass-shaped mark on their abdomens. Several species answer to the name, and they are ...

www.pestworld.org/pest-guide/spiders/black-widow-spiders

Curious about black widow spiders? Learn about black widow spider extermination, control, and additional information in our pest profile.

www.orkin.com/other/spiders/black-widows

Black widows are identified by red hourglass marking on the underside of their abdomens. Black widows are shiny black in color. Most black widow spiders' ...

www.webmd.com/skin-problems-and-treatments/black-widow-spider-bite

Jan 3, 2017 ... Black widow spiders are among the most feared spiders -- and with good reason. Learn how to spot them, what their bites feel and look like, ...

www.emedicinehealth.com/black_widow_spider_bite/article_em.htm

Aug 30, 2017 ... Of the 30,000 types of spiders, the black widow is probably the one best known and feared. Although spiders are often blamed for all kinds of ...

www.ask.com/youtube?q=Black+Widow+Spiders&v=PVqQdn6w2HM
Dec 11, 2015 ... Black Widow vs Praying Mantis: Spiders infest my house If you don't yet know the story, I started finding black widows in my house, and I have ...