Commonly Encountered Pennsylvania Spiders

This publication discusses the more common and important spider species in Pennsylvania, including two rarely encountered but medically important species.
Commonly Encountered Pennsylvania Spiders - Articles

Updated: September 18, 2017

Commonly Encountered Pennsylvania Spiders

Spiders are beneficial creatures that feed on all sorts of arthropods, including insects. About 3,000 species of spiders are found in the United States. Spiders rarely bite people, and most species are harmless. However, a few species of spiders produce bites that may have serious medical implications for humans. This full-color publication discusses the more common and important spider species in Pennsylvania. Photographs are also provided.