There are many organizations and groups available to help you identify and assess invasive and introduced species. Use the search tool on this page to search for people in your state or people that can help you with a particular species like Sudden Oak Death (SOD) (Phytophthora ramorum) or a group of species like weeds or pests.

* If you know about other organizations concerned with invasive or introduced species that you think should be included in this list, please contact Annie Simpson (asimpson@usgs.gov) or Elizabeth Sellers (esellers@usgs.gov).