Species Profiles - Insects and Other Invertebrates

Non-native invasive species have had a dramatic impact on the forests of Pennsylvania. Gypsy moth (oaks), hemlock woolly adelgid (eastern hemlock), and the bark scale (American beech) have altered the forest ecosystems of Pennsylvania. In addition, Pennsylvania forests are in imminent danger from the emerald ash borer (all ash species), Asian longhorned beetle (maples and other hardwood species), and Sirex noctilio (hard pines). Sirex noctilio was recently detected in Pennsylvania as the infestation in central New York spreads. The forest pests mentioned above also can affect agricultural resources in the nursery/landscape sector. Ash, oak and maple species rank among the most popular and widely planted trees nationally. In addition, exotic pests such as honey bee tracheal mite and varroa mite have had major impacts on honey bee populations in the state. Non-native nematodes, exotic snails and other invertebrates also impact our agricultural production. [Revised April 10, 2008]

(Ants, Bees, Wasps)
(Butterflies, Moths)
(True Bugs)
Other Invertebrates
(Worms, Snails)


  •  Species listed above are just some of the species that were mentioned in the various Council
    documents published in 2006 and this is not a comprehensive list of invasive species in this group for
  • Whenever possible, we have linked to a Pennsylvania specific fact sheet or a federal fact sheet.

For more information on Invasive Species of National concern visit the National Invasive Species Information
website. See the Dichotomous Key beginning on page (v.) and the Appendix C-Insect, Pathogen & Abiotic Advisories beginning on page (75.) of the National Park Service Forest Insect Disease Rapid Response Plan.

 Explore The Species Profiles: