Spiders have eight legs and two main body regions. They do not have wings or antennae.
Spider Control & Extermination Services
Identify the spider, remove active webs, reduce insect prey, and build a practical prevention plan for your San Diego property.
Call (619) 421 - 2101Spider control
Start With Identification and the Conditions Around the Web
Spiders are arachnids that feed primarily on insects and other arthropods. Most use venom to subdue prey, but very few species can seriously harm people. Around a home or business, the more common concerns are recurring cobwebs, egg sacs, unwanted sightings, and activity in places where people reach, store belongings, or work.
Spider activity can increase when insect prey, shelter, undisturbed harborage, and entry routes are available. Because most spiders are solitary, several webs do not necessarily represent a colony. A useful inspection connects each sighting to the type of web, likely species, prey source, hiding place, and way the spider reached the property.
GC Termite Control provides professional spider inspection, web and egg-sac removal, exclusion guidance, monitoring, and targeted treatment when warranted for San Diego homes and businesses.
Seeing recurring webs or widow activity?
Call (619) 421 - 2101 →Most spiders use venom on prey, yet only a small number are medically significant to people.
More than 50,000 described species live worldwide, with new species continuing to be documented.
Outdoor spiders consume many nuisance insects and are valuable parts of gardens and landscapes.
Lifecycle
Every Species Develops at Its Own Pace
Universal claims about egg numbers, egg sacs, or lifespan are misleading. Temperature, prey, species, sex, and other conditions all affect development and longevity.
Egg Sac
A female encloses eggs in silk. Sac shape, texture, location, and egg count differ substantially among species.
Spiderling
Young spiders hatch from the sac and may remain together briefly before dispersing to find prey and shelter.
Immature Molts
Spiderlings shed their exoskeleton repeatedly as they grow. The number and timing of molts are species-dependent.
Adult
Adults reproduce and continue hunting. Many common spiders live far less than long-lived female tarantulas, which can survive for decades.
Field guide
Read the Web Before Assuming the Spider
Web shape and location provide useful clues, although a specimen or clear photograph is normally needed for confident identification.
Cobweb Builders
Widows and common house spiders make tangled, irregular webs in protected corners, crevices, garages, and exterior objects.
Orb Weavers
Garden orb weavers build recognizable circular webs, often outdoors where flying insects are plentiful.
Cellar Spiders
Long-legged cellar spiders build loose webs in quiet indoor areas such as ceilings, basements, and storage rooms.
Active Hunters
Jumping and wolf spiders pursue prey rather than waiting in a capture web and may wander indoors accidentally.
San Diego identification
Know Which Sightings Need More Caution
Western black widows and brown widows occur around Southern California structures, but they should not be described as the only—or automatically the most common—spiders around every property.
Higher caution01
Western Black Widow Latrodectus hesperus
The mature female is usually shiny black with a red or orange hourglass-shaped marking on the underside. Immature females and males can look different, so color alone is not always enough.
Black widows favor dark, dry, sheltered, and relatively undisturbed places such as woodpiles, clutter, garages, vents, utility areas, and crevices. Their irregular silk feels unusually strong. Adult females are California's principal spiders capable of causing serious human injury, although bites remain uncommon and usually occur when the spider is trapped or disturbed.
Recognize outdoors02
Brown Widow Latrodectus geometricus
Brown widows are established in Southern California. Mature females are often mottled tan, brown, and gray, while their distinctive egg sacs have pointed silk projections.
Look beneath patio furniture, fence rails, plant pots, playground equipment, utility boxes, and other sheltered exterior recesses. Verified bites are generally milder than western black-widow bites, but an unidentified widow should never be handled with bare hands.
Indoor nuisance03
House & Cellar Spiders
Common house spiders create irregular cobwebs around windows, room corners, cupboards, and similar areas. Cellar spiders favor ceilings, basements, garages, and quiet storage spaces.
These spiders are generally of low medical concern. Their most visible impact is web buildup, and recurring activity often points to undisturbed harborage or a continuing supply of insect prey.
Outdoor allies04
Jumping Spiders & Orb Weavers
Jumping spiders are compact, alert hunters commonly seen moving across walls, fences, and plants. Orb weavers remain near organized garden webs that capture flying insects.
These spiders are usually best left outdoors when they are not in a high-contact location. An occasional indoor visitor can often be removed without a pesticide application.
California identification myth
Brown recluse spiders are not established in California.
The true brown recluse, Loxosceles reclusa, has no breeding population in the state. Related native recluse species occur mainly in southeastern California deserts, so ordinary brown spiders around coastal San Diego should not be marketed or identified as brown recluses without expert confirmation.
Inspection map
Six Places Spider Activity Builds
Garages & Storage
Boxes, equipment, shelving, and quiet corners provide cover and insect prey.
Attics & Basements
Low disturbance, hidden edges, and gaps can support webs and wandering spiders.
Eaves, Doors & Windows
Openings and lights near entrances can bring prey and spiders close to the structure.
Patios & Utility Areas
Furniture undersides, meter boxes, handles, and sheltered lips can conceal widows.
Vegetation & Woodpiles
Dense shrubs, leaf litter, debris, and stored firewood create exterior harborage.
Prey-Rich Areas
Flying insects around lights and insects near moisture give spiders reliable food.
Bite safety
Do Not Diagnose a Skin Lesion From Appearance Alone
Spiders do not seek people to bite. A bite is more likely when a spider is squeezed against skin, handled, or disturbed. Many lesions blamed on spiders are never confirmed by finding and identifying the spider.
Basic first aid
Stay calm, wash the area with soap and water, and apply a wrapped cold pack to reduce discomfort or swelling.
Get medical guidance
For a suspected black-widow bite or concerning symptoms, call Poison Help at 1-800-222-1222. Call 911 for breathing difficulty or another emergency.
Identify only if safe
Take a photograph or preserve the spider only when this can be done without another exposure. Do not cut, squeeze, or attempt to remove venom.
Medical disclaimer: GC Termite Control identifies and manages pests. We do not diagnose bites, determine a species from symptoms, or provide medical treatment.
Spider prevention
Reduce Access, Shelter, and Prey
Spider prevention is strongest when routine cleaning, exterior maintenance, and insect management work together. Continue monitoring previously active places after webs are removed.
- 01Seal access points. Repair cracks, screens, weather seals, and door sweeps around foundations, windows, doors, vents, and utility penetrations.
- 02Organize storage. Reduce clutter in attics, garages, basements, closets, and yards; keep sealed boxes off floors and away from walls.
- 03Clean hidden areas. Vacuum corners, ceiling edges, beneath furniture, and storage areas; remove accessible webs and egg sacs where this can be done safely.
- 04Reduce insect prey. Address sanitation and moisture issues, maintain screens, and position exterior lighting away from windows and doors where practical.
- 05Maintain the yard. Trim shrubs from the structure and move leaf litter, debris, firewood, and other sheltered materials away from the foundation.
- 06Inspect stored items. Check plants, boxes, equipment, shoes, clothing, and gloves; wear gloves when moving firewood or long-undisturbed materials.
Professional process
A Five-Step Spider Control Plan
The appropriate response depends on the species, activity areas, occupant concerns, and property conditions. New spiders can also disperse or enter after service, so monitoring matters.
Inspect & Identify
Inspect the home and yard for the spider, web type, egg sacs, entry points, harborage, and hiding places.
Map the Conditions
Connect activity to prey insects, clutter, exterior lighting, vegetation, moisture, and undisturbed storage.
Remove Activity
Vacuum or remove accessible spiders, webs, and egg sacs when safe, then document places that need follow-up.
Exclude & Correct
Close appropriate entry points, reduce harborage, clear recurring webs, and address conditions attracting insect prey.
Treat & Monitor
Use a targeted labeled treatment only where inspection warrants it, then monitor for new activity and reinvasion.
Treatment decisions
Use the Least-Disruptive Effective Tool
Most spider situations do not need blanket pesticide coverage. Any pesticide formulation, application site, rate, reentry direction, and safety requirement must follow its label.
Web Removal & Exclusion
Vacuuming, sweeping, accessible egg-sac removal, clutter reduction, prey management, screen repair, and sealing are the starting tools. They make new evidence easier to detect.
Glue Boards
Glue boards can help monitor or remove spiders in suitable hidden indoor locations. They do not attract every spider or resolve the cause and must remain inaccessible to children and pets.
Targeted Spray or Aerosol
An appropriately labeled product may be applied to confirmed harborage, cracks, crevices, or permitted exterior sites. It should not be broadcast broadly beneath furniture or throughout the structure and yard.
Insecticide Dust
A labeled dust may be useful in permitted cracks, crevices, attics, wall voids, or other inaccessible spaces. It is not intended for exposed walls, roofs, or occupied surfaces.
Realistic expectations: Pesticides alone provide temporary improvement when webs, prey, shelter, and access remain. Spider reduction depends on identification, physical removal, property maintenance, targeted treatment when appropriate, and follow-up. Read EPA label guidance →
When to call
When Professional Spider Control Makes Sense
Professional inspection is especially useful when identification or safe access is uncertain, activity returns after cleaning, or a sensitive property requires a documented plan.
- Western black widows or multiple widow egg sacs are present in high-contact areas.
- Webs recur throughout several rooms, exterior zones, or inaccessible voids.
- Garages, storage, utilities, commercial areas, or play spaces require careful service.
- The spider, treatment location, or cause of repeated activity remains uncertain.
Common questions
Spider Control FAQ
Which California spider is the greatest medical concern?
The mature female western black widow is California's principal spider capable of causing serious injury. Most other spiders around homes cannot seriously harm people, but unidentified spiders should still be handled cautiously.
How can I distinguish a black widow from a brown widow?
Mature female black widows are usually shiny black with a red or orange underside marking. Brown widows are often mottled tan, brown, and gray, and their egg sacs have distinctive pointed silk projections. Immature widows can be difficult to distinguish.
Are brown recluse spiders found in San Diego?
The true brown recluse has no established California breeding population. Many ordinary brown spiders are misidentified as recluses, so a photograph or specimen should be evaluated before making that claim.
Do several webs mean there is a spider colony?
Usually not. Most spiders are solitary. Several webs can develop where insect prey, protected attachment points, shelter, and low disturbance make the property favorable to multiple individual spiders.
Will spraying permanently eliminate spiders?
No method prevents every future spider. Pesticides are often temporary unless web removal, prey reduction, exclusion, clutter management, vegetation maintenance, monitoring, and customer cooperation are also addressed.
What should I do after a suspected spider bite?
Wash the site, apply a wrapped cold pack, and obtain medical guidance for concerning symptoms or a suspected black-widow bite. Call Poison Help at 1-800-222-1222, and call 911 for an emergency.
Trusted information
Spider Identification and Safety Resources
University of California IPMSpiders Around Homes and LandscapesView California guidance →
University of California IPMWidow Spiders and Their RelativesCompare widow spiders →
University of California IPMBrown Recluse Distribution and IdentificationReview the California facts →
California Poison Control SystemBite Symptoms and First AidRead bite guidance →
U.S. Environmental Protection AgencyWhy Pesticide Labels MatterReview EPA guidance →
Natural History Museum BernWorld Spider CatalogExplore the catalog →
Ready to clear recurring spider activity?
GC Termite Control can identify spider activity, remove visible webs, address harborage and entry conditions, and recommend targeted control for your San Diego property.
Professional Inspection•Web Removal•Targeted Control