The Southern House Spider (Kukulcania hibernalis) is male: dark brown; female: nearly black; both with some lighter markings and typically measures Female: ~3/4 inch body; Male: ~1/2 inch body with longer legs. The southern house spider (Kukulcania hibernalis) is a large, common spider found throughout Arizona and the broader Southwest. Males are frequently mistaken for brown recluse spiders due to their sim.

The Southern House Spider is generally low-risk, but caution is still advised. Not medically significant. Completely harmless to humans. Often mistaken for brown recluse — check for six eyes and violin marking to distinguish.

In Arizona, southern house spiders are most often encountered in the following situations: Flat, sheet-like webs with a funnel retreat in corners, under eaves, or in window frames. Large, dark brown (male) or nearly black (female) spider in or near the web. Males wandering in search of females.

The Southern House Spider is most active during: Year-round; most active in warm months. 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 removal of webs under eaves and in corners. Seal gaps around windows and doors. Reduce outdoor lighting that attracts insects.

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

If you spot a Southern House Spider 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.