The Cellar Spider, or daddy longlegs spider, is a cosmopolitan house spider with an extremely small round body and remarkably long, fragile legs. When disturbed it vibrates rapidly in its web, becoming a blur — a startling defense mechanism. Despite the persistent myth, its venom is not particularly potent; its fangs are actually capable of biting humans but effects are minimal.
Best time to see a Cellar Spider
The best time to see a Cellar Spider is April–September, when about 63% of U.S. sightings happen, based on 12,948 research-grade iNaturalist observations.
Not certain it is a Cellar Spider? What bug is this? walks through what to check first and the lookalikes that catch people out.
Recent Cellar Spider sightings near you
Live, research-grade observations from iNaturalist. Allow location to center the map on you.
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