Black widows are being targeted by invasive brown widows •
BROWN WIDOW BITE! Dangerous OR Not?
From Black Widows to Brown Recluses: A Look at South Carolina's Spiders
Invasive brown widow spiders thrive in city landscapes •
Brown widow spiders taking over in Southern California - Los Angeles Times
Widow Wars Natural History Museum
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Black Widow Spiders
Spiders: Brown Recluse and Black Widow Mississippi State University Extension Service
Brown widow spider - Latrodectus geometricus
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Black and Brown Widow Spiders
Black widows are being slaughtered by their brown widow cousins, and we don't know why
Which Spiders Look Like Black Widow Spiders?
Widow Wars Natural History Museum