Bug Identifier
Cellar Spider
Community identification

Cellar Spider

Pholcus phalangioides

Order & Family
Order Araneae, Family Pholcidae
Size
Body length is typically 2 to 10 millimeters, with a much larger leg span reaching up to 50 millimeters.
See this bug in the Encyclopedia

Natural Habitat

Found worldwide in dark, damp places such as cellars, basements, crawl spaces, attics, and the corners of rooms in houses.

Diet & Feeding

They feed primarily on other spiders, insects, and occasionally woodlice, using their long legs to wrap prey in silk before biting them.

Behavior Patterns

Known for vibrating rapidly in their webs when disturbed to confuse predators, and for building irregular, tangled, non-sticky webs in corners.

Risks & Benefits

Completely harmless to humans as their fangs are rarely able to puncture human skin and their venom is weak. They are beneficial because they help control populations of pests, mosquitoes, and even venomous spiders like black widows.