Spread patterns of Invasive Alien Species (IAS) of Union concern

The chart shows the number of Invasive Alien Species (IAS) of Union concern by reported spread pattern, including natural dispersal, intentional and unintentional human-assisted spread, combinations of spread pathways, and cases with no evidence of spread or unknown pathways. For each IAS of Union concern, the chart shows the number of Member States reporting the species under different spread patterns, including cases where no spread pattern was reported.