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General
- Global Invasive Species Database (external link)
- CABI Invasive Species Compendium (external link)
- Pet Pathway Toolkit (external link)
Open access journals
Great Britain
- Centre for Ecology and Hydrology (external link)
- Animal and Plant Health Agency (external link)
- Community Woodlands Association (external link)
- Natural Resources Wales (external link)
- Defra (external link)
- Environment Agency (Non-native species) (external link)
- Nature Scot (external link)
- Scottish Government (external link)
- Forestry Commission (external link)
- HMRC (external link)
- Joint Nature Conservation Committee (external link)
- Welsh Government (external link)
- Natural England (external link)
- UK Plant Health Information Portal (external link)
- Plant Health Controls (external link)
- UK Biodiversity Action Plan (external link)
- UK Rivers Network (external link)
- National Trust (external link)
- Scotland's Environmental and Rural Services (external link)
- Wildlife Trusts (external link)
- The Rivers Trust (external link)
- English Heritage (external link)
- Aquatic Plant Management (CEH) (external link)
- The Rivers Restoration Centre (external link)
Regional/local projects
Fish
- Cefas (external link)
- Aquatic Animal Health and Movements (external link)
- Angling Trust (external link)
Invertebrates
Plants
- Royal Horticultural Society (Invasive non-native species) (external link)
- Centre for Aquatic Plant Management (external link)
- Botanical Society of Britain & Ireland (external link)
Overseas
- European Plant Protection Organisation (external link)
- Invasive Species in Ireland (external link)
- Global Invasive Species Programme (GISP) (external link)
- IUCN Invasive Species Specialist Group (external link)
- United States Department of Agriculture, National Invasive Species Information Centre (external link)
- NOBANIS - European Network on Invasive Alien Species (external link)
- Biosecurity New Zealand (external link)
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