Pholcid Spider (Cellar Spider)
Scientific Name: Pholcidae (Family)
Order & Family: Order: Araneae, Family: Pholcidae
Size: Body length ranges from 2–10 mm (0.08–0.39 in), but with their excessively long legs, they can appear much larger, sometimes spanning up to 50 mm.
Natural Habitat
Typically found in damp, dark places like cellars, basements, and garages. They also inhabit caves and crevices in rock formations in the wild. Indoors, they often create webs in corners of ceilings or behind furniture.
Diet & Feeding
Carnivorous. They primarily eat other insects, spiders (including larger species), and sometimes other harvestmen. They trap prey in their messy, irregular webs.
Behavior Patterns
Known for their 'vibrating' defense mechanism where they shake rapidly in their web when threatened to become blurry and hard for predators to target. They build loose, irregular webs rather than geometric ones.
Risks & Benefits
Benefits: They are excellent pest controllers, often eating nuisance insects like mosquitoes, flies, ants, and even venomous spiders like Brown Recluses or Black Widows. Risks: Harmless to humans. While they have venom, their fangs are too small and weak to effectively penetrate human skin, and the venom is not medically significant.
Identified on: 3/6/2026