Cellar Spiders in Southern Maine:
Identification, Prevention, and Control
Cellar spiders are a frequent sight in Southern Maine homes particularly around Biddeford and Scarborough. Our humid coastal climate older basements and crawl spaces with plenty of small insects provide ideal habitat for these long legged arachnids year round.
What Are Cellar Spiders?
Cellar spiders also known as daddy longlegs spiders belong to the family Pholcidae with the long bodied cellar spider being the most common species indoors. They have very small pale tan to gray bodies and extremely long thin legs that can span up to two inches.
Unlike harvestmen which are not true spiders cellar spiders build loose irregular cobwebs in dark quiet areas and hang upside down waiting for prey. They are highly beneficial because they eat flies ants and other household pests including other spiders. Cellar spiders are among the most recognizable spiders in southern Maine homes due to their unusually long legs. Browse the spiders pest library to compare other spider species found in the area.
For detailed local identification photos and species information see the University of Maine Cooperative Extension cellar spiders fact sheet.
Signs of Infestation
These common indicators often appear first in basements attics or corners.
- Messy irregular cobwebs in ceiling corners window frames or behind furniture
- Spiders with extremely long thin legs hanging upside down in their webs
- Small pale or gray spiders scurrying quickly when disturbed
- Shed skins or tiny dark fecal spots below webs
- Increased web building in damp basements crawl spaces or garages
- Spiders visible near pipes utility entries or storage areas
- Occasional spiders wandering across floors or walls at night
In Biddeford and Scarborough homes these signs often increase during fall and winter when cellar spiders seek shelter indoors.
Risks in Southern Maine
Cellar spiders pose no real risk to people or pets in Southern Maine. They are not aggressive and their venom is harmless to humans with bites being extremely rare and milder than a mosquito bite.
In our humid coastal and wooded Southern Maine climate older homes with damp basements and abundant insect prey allow populations to build year round. While they cause no structural damage their messy webs can look unsightly and some people feel uneasy around them. My low impact Integrated Pest Management approach follows best practices from the Maine DACF Got Pests spiders page and focuses on safe humane solutions tailored to our local environment keeping your family pets and beneficial spiders protected where possible. Cellar spiders are often confused with house spiders and harvestmen, but cellar spiders are true spiders with two distinct body parts and build loose webs, while harvestmen have a single fused body segment and no web, and house spiders have a more rounded abdomen and shorter legs.
Prevention Tips
Consistent habits keep cellar spider numbers low in our climate.
- Vacuum webs and spiders regularly especially in corners basements and behind furniture
- Reduce indoor insect prey by addressing flies ants and other pests promptly
- Seal cracks and gaps around windows doors pipes and foundations with caulk
- Keep basements attics and storage areas dry and well organized
- Use dehumidifiers in damp areas to make the environment less appealing
- Store boxes and clutter off the floor and away from walls
- Improve lighting in dark corners to discourage web building
These steps prove especially effective in Biddeford and Scarborough homes where older construction and humidity often support cellar spider populations.
Professional Treatment
When prevention alone is not enough I deliver precise low impact professional treatment for cellar spiders customized to every Southern Maine property.
As a solo operator with more than 15 years of hands on experience I begin every job with a detailed inspection to locate all web sites entry points and insect food sources including hidden gaps in foundations wall voids and attic spaces.
Once identified I work directly with you to reduce prey insects first then remove existing spiders and webs humanely with vacuuming or catch and release. I then seal entry points and apply only targeted dusts or barriers exactly where needed that remain completely family and pet safe with no broad spraying.
Every plan stays fully customized to the property a single family home in Biddeford with a damp basement receives different attention than a business in Scarborough with storage areas. I handle the entire process myself from start to finish with follow up visits included until the issue is completely resolved. Learn more about my background and methods on the About page. Contact me today to schedule your free inspection on the Contact page. For ongoing protection against cellar spiders and other common indoor pests throughout the year, take a look at my year-round pest protection plan.
Frequently Asked Questions
Cellar spiders have two distinct body parts and build messy webs. Harvestmen have one body segment and no webs while dangerous spiders like black widows are shiny black with red markings and are not common in Maine.
They rarely bite and their venom is harmless to humans. They do not spread disease and are actually beneficial because they eat other household pests.
Most clients notice far fewer webs and spiders within one week once entry points are sealed and existing spiders are removed. Full long term reduction usually takes 30 days or longer depending on how consistently prevention steps stay followed. I include follow up visits at no extra charge until the problem is completely solved.
Related Resources
- Detailed local facts from University of Maine Cooperative Extension: Cellar Spiders Fact Sheet
- Official guidance from Maine DACF Got Pests: Spiders
Why Choose Precision Pest Control?
Your local solo specialist, I offer customized, low-impact pest control fitted to Southern Maine challenges for homes and businesses. Protect your property today. Reach out for your free inspection.