What the numbers mean
States with active university arachnology programs (e.g., California, Texas, Florida) consistently report more species - largely because more collecting has occurred there. Use counts as a research-effort proxy alongside true biodiversity.
References
- [1]World Spider Catalog - Natural History Museum of Bern. Accessed June 2026.
Related in Data
- Spider bite statistics (United States)Aggregated public-health data on verified spider bites in the United States, drawn from the American Association of Poison Control Centers National Poison Data System (NPDS)..
- Medically significant spiders in the USOnly two genera in the United States produce envenomation of significant clinical consequence: Latrodectus (widows) and Loxosceles (recluses)..
- Verified Loxosceles range (United States)Established populations of native Loxosceles species in the United States, based on museum specimens and verified field collections compiled by Vetter and collaborators..
- Latrodectus species distribution (United States)Native Latrodectus species occupy distinct overlapping ranges across the United States: L.
- Seasonality of indoor spider encountersIndoor sightings of large synanthropic spiders peak in late summer and early autumn in most US regions, driven primarily by male search activity rather than population growth..
- Poison control call trends (United States)AAPCC NPDS data show a steady ~3,500–4,500 annual calls coded for spider exposure across the past decade, with the majority classified as minor and fatalities essentially absent in recent reporting years..