Daddy long-legs spider

The Daddy long-legs spider, also called the cellar spider or house spider, is a true spider and not a harvestman. Daddy longlegs is a name that is used for several unrelated arthropods with extremely long and thin legs, including these spiders, the harvestmen and tipulid crane flies.

These spiders are web weavers. They make either sheet webs or irregular webs, and they hang inverted from them. Many species are fond of making their webs in cellars or basements. They may draw one's attention to them by bobbing rhythmically when their webs have been disturbed slightly, and for this reason have sometimes been called vibrating spiders. Doing so probably increases their chances of capturing insects that have just brushed their web and are still hovering nearby. They comprise the Pholcidae family, in the suborder Araneomorpha.