California's Biology
International Invasives Resources
- Alien Species Harmful to North American Forests - FAO
- Aquatic Non-Native Invasive Species RAP (Canada)
- Aquatic Plant Management Society
- Baltic Sea Alien Species Database
- Biodiversity and Conservation, Chapter 9: Exotic Introductions
- Biological Invasions (journal)
- Convention on Biological Diversity - Alien Species
- Database on Introductions of Aquatic Species - FAO
- Davis Declaration
- Ecological Monitoring and Assessment Network
- Economics of Invasives. A bibliography
- Eleventh International Conference on Aquatic Invasive Species
- Exotic Forest Pest Information System for North America
- Exotics Across the Ocean
- Global Invasive Species Programme
- Global Invasive Species Database (GISP)
- IABIN Invasives Information Network (I3N) Cataloguer
- Impact of Invasive Plants on Species and Habitats at Risk in Canada
- Integrated Taxonomic Information System - North America
- Inter-American Biodiversity Information Network
- Inter-American Biodiversity Information Network -- United States site
- International Weed Science Society
- Invading Species Homepage (Ontario)
- Invasive Grass Species in Southern Africa
- Invasive Plants
- Invasive Plants of Canada Project
- Invasive Plants of Natural Habitats in Canada
- Invasive Species Specialist Group
- Invasive Woody Plants in the Tropics research group
- Island Invasion: Exotics Threaten Pacific Ecosystems
- Natural Invaders (Canada)
- The North American Non-Indigenous Arthropod Database
- North American Weed Management Association
- Photographs and information on aquatic invasive species in the UK
- Regional Biological Invasions Center (Russia)
- The Species Analyst
- The State of Canada's Environment - Exotic Species
- Weed Science - Department of Agriculture - Western Australia
- Feral animals in Australia
