Global Invasive Species Database
www.issg.org/database/welcome
CABI Invasive Species Compendium
www.cabi.org/isc
Great Britain
GB Non-Native Species Secretariat
www.nonnativespecies.org
Centre for Ecology and Hydrology
www.ceh.ac.uk
Food and Environment Research Agency
www.fera.defra.gov.uk
Countryside Council for Wales
www.ccw.gov.uk
Natural England
www.naturalengland.org.uk
Scottish Natural Heritage
www.snh.org.uk
Defra
www.defra.gov.uk
Invasive Species in Ireland
www.invasivespeciesireland.com
Recording Invasives
Plant Tracker
www.planttracker.naturelocator.org