Source: U.S. National Park Service. Available online:
http://www.nps.gov
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.
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By
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Healthwise Staff |
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Primary Medical Reviewer
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William H. Blahd, Jr., MD, FACEP - Emergency Medicine |
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Specialist Medical Reviewer
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H. Michael O'Connor, MD - Emergency Medicine |
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Last Revised
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October 15, 2011 |