Species not Established in the U.S.

Invasive species are a known global problem. Global trade and travel have increased the number of introduced invasive species, which have had a harmful impact on our economy and environment.

The following species of concern provides examples of why we must increase our efforts in early detection and rapid response and prevention of new introductions. See other sections for species specific information:

• Aquatic Species
• Plants
• Animals
• Microbes

This information is provided as an educational tool and is not inclusive of all invasive species not yet established in the U.S.

General

Ten Invasive Species Not Yet Established in the United States (2004; PDF | 250 KB)
National Environmental Coalition on Invasive Species.

Gallery of Pests: Pests & Pathogens that have not yet arrived or have been eradicated - Section 1
Invasive.org.
Archive from the Nature Conservancy, Global Invasive Species Team.
Note: See the main page for Gallery of Pests for more information regarding pests threatening the U.S.

Invasive and Emerging Fungal Pathogens - Diagnostic Fact Sheets
USDA. ARS. Systematic Mycology and Microbiology Laboratory.
Includes images and information for fungi of quarantine significance.

Federal Noxious Weed List (Dec 10, 2010; PDF | 81 KB)
USDA. APHIS. Plant Protection and Quarantine.
USDA Officials have determined that certain species not native to the U.S. are at risk of becoming invasive should they enter this country. As part of its effort to prevent the introduction of invasive or potentially invasive weeds, the USDA maintains an official Federal Noxious Weed List. Many taxa on this list are currently serious weeds elsewhere in the world, and about two-thirds of the taxa are currently found in the U.S.