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 Staff Primary Medical ReviewerWilliam H. Blahd, Jr., MD, FACEP - Emergency Medicine Specialist Medical ReviewerH. Michael O'Connor, MD - Emergency Medicine
William H. Blahd, Jr., MD, FACEP - Emergency Medicine & H. Michael O'Connor, MD - Emergency Medicine
This information does not replace the advice of a doctor. Healthwise, Incorporated, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the
how we develop our content .