- Alien Plants Ranking System
- APHIS Regulated Pest List
- Aquatic Ecosystem Restoration Foundation
- Aquatic Invasions Research Directory
- Aquatic Nuisance Species Task Force
- Beware of Invasive Species
- Biological Pollution - Aquatic Invasive Species
- Biotic Invasions: Causes, Epidemiology, Global Consequences and Control
- Center for Aquatic and Invasive Plants
- Center for Invasive Plant Management
- The Consequences of the Dissolution of Wallaces's Realms
- Costly Interlopers
- Eastern Region Invasive Species
- Environmental and Economic Costs Associated with Non-Indigenous Species in the United States
- Executive Order 13112 - Invasive Species
- Exotic Fish, Shellfish, and Plants (Texas)
- Exotic Species and their Effects on the Great Lakes
- Federal Interagency Committee for the Management of Noxious and Exotic Weeds
- Federal Noxious Weed Database
- Federal Noxious Weed List
- Federal Noxious Weed Program
- Florida Bureau of Invasive Plant Management
- Florida Exotic Pest Plant Council
- Forestry Images: The Source for Forest Health and Silviculture Images
- From Microbes to Mammals - Invasive Species
- Harmful Non-Indigenous Species in the United States
- Harmful Non-Native Species: Issues for Congress
- Hearing on Invasive Species
- How to Prevent the Spread of Noxious Weeds
- IABIN Invasives Information Network (I3N) Cataloguer
- The impact of invasive species on reptiles and amphibians
- Information Management System for Invasive Species (USDA)
- An Initial Survey of Aquatic Invasive Species Issues in the Gulf of Mexico Region
- Institute for Biological Invasions
- Integrated Graduate Education and Research Traineeship: Biological Invasions
- Integrated Taxonomic Information System
- Inter-American Biodiversity Information Network -- United States site
- Invasive Non-Native Species
- Invasive Plants Fact Book
- Invasive Species - American Land Alliance
- Invasive Species: Control and Management Technologies
- Invasive Species Fact Sheet
- Invasive Species Fact Sheet (Dept. of Interior)
- Invasive Species Fact Sheet (US Navy)
- Invasive Species in the Great Lakes Region
- Invasive Species News
- Invasive Species Program
- Invasive Species Projects List
- Invasive Species, Recommendations Report, 2000 NCSPE
- Invasives on the Web
- Invasive Plant Council of New York State
- Invasivespecies.gov
- Marine Bioinvaders
- Meeting the Invasive Species Challenge: Management Plan
- National Ballast Water Information Clearinghouse
- National Invasive Species Act of 1996
- National Invasive Species Council
- National Invasive Weeds Awareness Week (February 26-March 2, 2001)
- National Marine Invasions Center
- Nonindigenous Aquatic Species
- Nonindigenous Aquatic Species Program
- Nonindigenous Crustacean Distribution Information
- Nonindigenous Fish Distribution Information
- Nonindigenous Species
- Non-Indigenous Species: Activities for Youth
- Non-Native Invasive Plant Species - Connecticut Dept. of Environmental Protection
- Noxious, Invasive, and Alien Plant Species (Wetland Science Institute)
- OWOW Invasive Species Program
- Partners Against Weeds
- Patuxent's Effects of Ecological Processes and Human Impacts on Biological Resources - Invasive Species
- Pest Invaders Map
- Predicting the Spread of Non-indigenous Invasive Plant Species: Can it be Done?
- Problem Aquatic Plants in the Western United States
- Proceedings of the Workshop on Databases for Nonindigenous Plants
- Sea Grant: National Aquatic Nuisance Species Clearinghouse
- Sea Grant Nonindigenous Species Site
- Significant New Nonindigenous Species Reports
- Species Abstracts of Highly Disruptive Exotic Plants
- The Spread of Invasive Weeds in Western Wildlands
- State Plant Regulatory Agencies & Noxious Weed Coordinators
- TEKTRAN - Invasive Species
- US Army Corps of Engineers: Zebra Mussel Program
- US Dept. of Transportation Policy Statement on Invasive Alien Species
- USGS Research Upsets Conventional Wisdom on Invasive Species Invasions
- Weed Hall of Shame
- Weed Invasion Susceptibility Prediction Modeler
- Weed Science Society of America
- Weeds Gone Wild: Alien Plant Invaders of Natural Areas
- Weeds Website
- Western Society of Weed Science
- Wisconsin Department of Natural Resources - Invasive Species
