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Source: U.S. National Park Service. Available online:
Black widow spiders (Latrodectus mactans) are found throughout the United States.
Female black widows are long-legged, shiny, coal-black spiders with an orange,
red, or yellow hourglass shape on their underside. Female black widows are
usually about 1.5 in. (3.8 cm)
across but may be smaller.
ByHealthwise StaffPrimary Medical ReviewerWilliam H. Blahd, Jr., MD, FACEP - Emergency MedicineSpecialist Medical ReviewerH. Michael O'Connor, MD - Emergency Medicine
Current as ofNovember 14, 2014
Current as of:
November 14, 2014
William H. Blahd, Jr., MD, FACEP - Emergency Medicine & H. Michael O'Connor, MD - Emergency Medicine
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