Sonoma County's combination of coastal moisture, mild temperatures, and abundant insect prey supports a diverse spider population. While most are harmless, black widows and brown widows pose genuine health risks—particularly in garages, woodpiles, and outdoor storage areas common on Wine Country properties.
Call (707) 286-7002We identify which species are present and where. Black widows tend to occupy consistent harborage sites—once we map these locations (ground-level corners, irrigation boxes, retaining wall gaps), we can target treatment precisely rather than blanket-spraying your entire property.
We physically remove existing webs and egg sacs, then apply residual products to harborage zones. For black widows, direct contact treatment of hiding spots is more effective than perimeter sprays because widows rarely walk across treated surfaces—they sit in their webs.
Spiders go where insects are. Reducing exterior lighting that attracts flying insects, managing moisture that breeds ground-level prey, and clearing debris piles reduces the food supply that sustains spider populations around your home.
Our region's ecology supports spider diversity that many drier California areas don't see. Coastal fog moisture sustains insect populations through summer, which in turn sustains spiders. Properties near vineyards, orchards, or creek corridors see particularly high spider activity.
We provide spider inspections and treatments across the region:
No. Despite widespread fear, brown recluse spiders (Loxosceles reclusa) are not established in California. They're native to the south-central United States. Spiders mistaken for brown recluses in our area are typically male southern house spiders or brown ground spiders. If you're concerned about a spider bite, save the spider for identification.
Very likely. Black widows don't live in large groups, but a garage that supports one widow typically has habitat suitable for several. We commonly find 5–15 widows during a thorough garage and perimeter inspection. Their webs are distinctive—irregular, strong, and positioned near ground level.
Generally no. Garden spiders (orb weavers, jumping spiders, crab spiders) are beneficial predators that consume pest insects. We recommend removing only venomous species (widows) from areas where people are active. A healthy garden spider population actually reduces the flying insects that make patios unpleasant.
Late summer through fall is peak spider season. Orb weavers reach full size and build their largest webs. They're also mating, which increases visible activity. Reducing porch lighting or switching to yellow/sodium vapor bulbs significantly reduces the flying insects that attract web-building spiders to your porch.
Carpenter ants, Argentine ants, and odorous house ants.
Heat treatments and targeted elimination.
Oriental and German cockroach removal.
Rats, mice, and vole management.
Black widow and brown widow removal.
Drywood and subterranean termite treatment.
Yellow jacket and paper wasp removal.