In order to get better understanding of the invasive alien species and their impact on European biodiversity the EEA, supported by a number of experts, has established a list of the worst invasive alien species threatening biodiversity in Europe.
D’fhonn tuiscint níos fearr a fháil ar na speicis choimhthíocha ionracha agus a dtionchar ar bhithéagsúlacht Eorpach tá an EEA, le cabhair ó roinnt saineolaithe, tar éis liosta a chruthú de na speicis choimhthíocha ionracha is measa atá mar bhagairt do bhithéagsúlacht na hEorpa.