Invasive Alien Species

Invasive Alien Species (IAS) are animals and plants that are introduced accidently or deliberately into a natural environment where they are not normally found, with serious negative consequences for their new environment.

External websites

 * Q-bank, a comprehensive database on Quarantine plant pests and diseases
 * PlantTracker (UK)
 * ias-ess.org (no longer valid link) Invasive Alien Species-Exotic Specimen Sightings