Hemlock woolly adelgid
Hemlock woolly adelgid

Adelges tsugae Photo credit: Nicholas Tonelli

press to zoom
European woodwasp
European woodwasp

Sirex noctilio Photo credit: © George Wilkinson/Flickr

press to zoom
Asian longhorned beetle
Asian longhorned beetle

Anoplophora glabripennis Photo credit: Linda Hubley, United States Department of Agriculture

press to zoom
Gypsy moth (caterpillar)
Gypsy moth (caterpillar)

Lymantria dispar Photo credit: Pixabay.com

press to zoom

Insects & Arachnids

Common: Species found in at least 1/3 of Pennsylvania counties.

Uncommon: Species found in Pennsylvania, but not widespread (i.e., found in less than 1/3 of Pennsylvania counties.)

Not present: Species not yet found in Pennsylvania.

Note: Species list updated in September 2021.