https://www.fws.gov/invasives/faq.html FAQs - Invasive Species - U.S. Fish and Wildlife Service Invasive Species Overview: Fish and Wildlife Frequently Asked Questions About Invasive Species exotic U.S. Fish and Wildlife Service Invasive Species 4,300 invasive species 4,300 invasive species FAQ about Invasive Species www.fws.gov/invasives/faq.html http://www.fws.gov/invasives/faq.html invasive Invasive Species