The term “daddy long legs” can refer to different arachnids commonly found in homes. It often describes the harvestman (order Opiliones), not a true spider, distinguished by its single, fused body segment and lack of silk-producing spinnerets or venom glands. The name also applies to cellar spiders (Pholcidae family), true spiders with two distinct body segments that produce silk and venom, though their venom is not considered medically significant to humans. This article explores the various reasons these long-legged creatures venture indoors.
Environmental Motivations for Seeking Shelter
Daddy long legs frequently move indoors driven by environmental factors and biological needs such as stable temperatures, appropriate humidity, and access to food. They are attracted to damp environments, making basements, crawl spaces, and garages particularly appealing. These areas often provide relief from external conditions like extreme heat, cold, or heavy rain, helping them survive and thrive.
The presence of other insects also draws them inside, as these serve as a crucial food source. Daddy long legs are opportunistic feeders, preying on small insects like flies, ants, mites, and even other spiders. During mating season, typically in late summer and fall, harvestmen may gather in larger numbers and seek indoor spaces.
Common Entry Points Into Homes
These creatures typically find their way into homes through small openings and structural vulnerabilities. Cracks in foundations and gaps around windows and doors are frequent access points. Even tiny crevices can be sufficient for them to squeeze through.
Utility line openings, where pipes or electrical wires enter the house, also provide convenient pathways. Unscreened or damaged windows and doors, along with torn window screens, facilitate their entry. Open doors, especially those leading to basements or garages, also allow them inside.
Preferred Indoor Habitats
Once inside, daddy long legs gravitate towards specific indoor environments that mimic their preferred outdoor conditions. They favor dark, damp, and undisturbed places. Common indoor habitats include basements, crawl spaces, attics, and the corners of rooms.
These areas offer reduced light and minimal human activity, providing a sense of security. They can also be found behind furniture, in closets, or other seldom-disturbed storage areas.
Managing Their Presence
Effectively managing their presence indoors involves addressing the factors that attract them. Sealing entry points is a primary step, which includes caulking cracks in foundations and around windows and doors. Installing or repairing window and door screens and ensuring proper weatherstripping can create physical barriers.
Reducing indoor humidity is also important, as they prefer damp conditions. Using dehumidifiers in basements and crawl spaces, fixing leaky pipes, and ensuring adequate ventilation can help dry out moist areas. Maintaining a clean and clutter-free environment minimizes hiding spots. Regularly cleaning to remove webs and dust also discourages their presence.