The daddylonglegs spider is also commonly called the cellar spider, after its habit of living in dark, out-of-the-way places. I found this specimen living in close proximity to Steatoda  cobweb spiders in my garage. These spiders probably prey upon each other when the pickings get slim in the wintertime, but as of September, there are still enough flying insects visiting for all to coexist peacefully. It is said these spiders, when threatened, vibrate their legs and bodies so rapidly as to become invisible; hence their other common name: vibrating spider. Actually, what they do is hurl their bodies around in a circle so rapidly they become blurred and nearly invisible. I've captured the spider doing this; it's actually quite a sight! Here is the vibrating spider video:

Quicktime Movie of Vibrating Spider Vibrating (8.8 Mb)