The False Widow (Steatoda spp.) is dark brown to black; round abdomen; may have pale markings and typically measures 1/4–1/2 inch body. False widow spiders (genus Steatoda, family Theridiidae) are dark, round-bodied spiders that are frequently mistaken for black widows due to their similar shape and dark coloration. However, they lack.

The False Widow is generally low-risk, but caution is still advised. Not medically significant. Bites cause only minor localized pain and irritation. Often mistaken for black widows — check for the red hourglass to distinguish.

In Arizona, false widows are most often encountered in the following situations: Dark brown to black, round-bodied spider in an irregular web in corners or sheltered areas. Lacks the red hourglass of the black widow. Egg sacs (round, white to tan) in the web.

The False Widow is most active during: Year-round indoors. Arizona's warm desert climate can extend activity periods compared to other states, so year-round vigilance is recommended in the Phoenix metro and surrounding areas.

Regular vacuuming of corners and sheltered areas. Seal gaps around windows and doors.

Web removal and perimeter treatments if populations are high. No medical concern.

If you spot a False Widow indoors, avoid handling it directly. Capture it under a glass if possible for identification, or photograph it for reference. Contact Pest Control Bros for a professional inspection — we can confirm the species, assess the severity of the infestation, and recommend targeted treatment.