BugFinder Insects by State Spiders Butterflies & Moths Bees, Ants, & Wasps Beetles All Bugs Videos (YouTube)

Brown Widow (Latrodectus geometricus)

Detailing the physical features, habits, territorial reach and other identifying qualities of the Brown Widow

Loading SVG image placeholder
Image Credit: Danny C.
Full-sized image of the Brown-Widow Thumbnail image of the Brown-Widow
Image Credit: Arch Baker
Full-sized image #2 of the Brown-Widow Thumbnail image #2 of the Brown-Widow

The Brown Widow is a more timid relative to the well-known and dangerous Black Widow, and though it is less toxic, its bite can pack a punch.

Updated: 01/02/2022; Authored By Staff Writer; Content ©www.InsectIdentification.org
The moment the bright orange hourglass on her belly becomes visible, most people recognize this spider as a type of Widow. The overall brown/gray color and smaller size is standard for a Brown Widow. A black and white (or ivory) geometric pattern is visible on the dorsal (back) side of the abdomen. Legs are two-toned with wide bands of black and brown along the length of each one. It is likely that an observer will see her egg sac before seeing the female that made it. Egg sacs look like small, spiky golf balls. Other Widow spiders have smooth egg sacs.

Brown Widow spiders are native to Africa and have made a home in North America, most recently in California since 2003. The number of Brown Widow sightings in that state has led to research on the effect their presence is having on the native Black Widow population. They successfully compete for space and resources and seem to be outnumbering them in many areas.

While Brown Widows are venomous (as almost every spider is), their venom is not as toxic as the Black Widow because they are smaller-sized and transmit much smaller doses. The good news is that Brown Widows are extremely shy and prefer to flee from danger, rather than strike at the threat. Females protecting silky white egg sacs are most likely to bite since a retreat may cost them their eggs. Cornered or trapped spiders are also more apt to bite as a means of potential escape. Bites, though rare, are painful and victims would be wise to visit a medical professional in the uncommon case of a potential sensitivity to the venom.

Compared to other spiders in the Widow family, this is the least dangerous and most docile. They are becoming more abundant in places where humans tread. Silk webs can be built near houses, garages, sheds, parking lots and even gas stations. Despite the diminished risk of a bite, it is still wise to keep clear of the Brown Widow and leave it undisturbed. The Brown Widow bears a classic warning mark; it is best that we take heed.©InsectIdentification.org

Note: The above text is EXCLUSIVE to the site www.InsectIdentification.org. It is the product of hours of research and work made possible with the help of contributors, educators, and topic specialists. If you happen upon this text anywhere else on the internet or in print, please let us know at InsectIdentification AT gmail DOT com so that we may take appropriate action against the offender / offending site and continue to protect this original work.

General Characteristics

Capability, Shape, Texture/Pattern, Benefits, Dangers
Insect biting icon
Patterned insect icon
Striped or banded insect icon
Venomous insect icon

Taxonomic Hierarchy

Species Breakdown
Kingdom: Animalia
  Phylum: Arthropoda
    Class: Arachnida
      Order: Araneae
        Family: Theridiidae
View More
          Genus: Latrodectus
View More
            Species: geometricus

Identifying Information

Size, Colors, Features
Scientific Name: Latrodectus geometricus
Other Name(s): Grey Widow, Brown Black Widow, House Button Spider, Geometric Button Spider
Category: Spider
Size (Adult; Length): 3mm to 17mm (0.11" to 0.66")
Colorwheel Graphic Colors: brown; black; orange; yellow; ivory; gray
Descriptors: hourglass; spot; biting; venomous; banded; striped

Relative Size Comparison

Typical Size Between 3mm (0.1in) and 17mm (0.7in)
Lo: 3mm
Md: 10mm
Hi: 17mm

Territorial Map*

U.S., Canada, and Mexico
State of Alabama graphic
State of Arizona graphic
State of Arkansas graphic
State of California graphic
State of Colorado graphic
State of Delware graphic
State of Florida graphic
State of Georgia graphic
State of Idaho graphic
State of Illinois graphic
State of Indiana graphic
State of Iowa graphic
State of Kansas graphic
State of Kentucky graphic
State of Louisiana graphic
State of Maine graphic
State of Maryland graphic
State of Michigan graphic
State of Minnesota graphic
State of Mississippi graphic
State of Missouri graphic
State of Montana graphic
State of Nebraska graphic
State of Nevada graphic
State of New England graphic
State of New Jersey graphic
State of New Mexico graphic
State of New York graphic
State of North Carolina graphic
State of North Dakota graphic
State of Ohio graphic
State of Oklahoma graphic
State of Oregon graphic
State of Pennsylvania graphic
State of South Carolina graphic
State of South Dakota graphic
State of Tennessee graphic
State of Texas graphic
State of Utah graphic
State of Virginia graphic
State of Washington graphic
State of West Virginia graphic
State of Wisconsin graphic
State of Wyoming graphic
Canadian territory of Alberta graphic
Canadian territory of British Columbia graphic
Canadian territory of Manitoba graphic
Canadian territory of New Brunswick graphic
Canadian territory of Newfoundland and Labrador graphic
Canadian territory of Ontario graphic
Canadian territory of Quebec graphic
Canadian territory of Saskatchewan graphic
Territory map graphic of the country of Mexico
Contiguous United States shape map layer graphic
Prince Edward Is.  
* MAP NOTES: The territorial heat map above showcases (in red) the states and territories of North America where the Brown Widow may be found (but is not limited to). This sort of data is useful when attempting to see concentrations of particular species across the continent as well as revealing possible migratory patterns over a species' given lifespan. Some insects are naturally confined by environment, weather, mating habits, food resources and the like while others see widespread expansion across most, or all, of North America. States/Territories shown above are a general indicator of areas inhabited by the Brown Widow. Insects generally go where they please, typically driven by diet, environmental changes, and / or mating habits.
Site Disclaimer  |  Privacy Policy  |  Cookies  |  Sitemap
Beetle Identification Butterfly Identification Caterpillar Identification Spider ID Fungal Infections on Insects Nursery Web Spider Official State Insects Termite Basics Insect Molting Process Bugs of Tennessee House Centipede JoroSpider.org

2024 www.InsectIdentification.org • Content ©2006-2024 InsectIdentification.org • All Rights Reserved. The InsectIdentification.org logo, its written content, and watermarked photographs/imagery are unique to this website (unless where indicated) and is protected by all applicable domestic and international intellectual property laws. Material presented throughout this website is for entertainment value and should not to be construed as usable for scientific research or medical advice (regarding bites, etc...).Please consult licensed, degreed professionals for such information. By submitting images to us (InsectIdentification.org) you acknowledge that you have read and understood our Site Disclaimer as it pertains to "User-Submitted Content". Images in JPG format are preferred with a minimum horizontal dimension of 1000px if possible. When emailing please include your location and the general estimated size of the specimen in question if possible. Please direct all inquiries and comments to insectidentification AT gmail.com. No A.I. was used in the generation of this content.

©2024 www.InsectIdentification.org • All Rights Reserved • Content ©2006-2024 (18yrs)