European Alien Species Information Network.Close to 7,000 different species are owned by pet owners across Europe, including mammals, birds, reptiles, amphibians, fish. Some of these pet species are imported from outside Europe and can potentially cause ecological problems if they escape or are released in the environment. The importation of some invasive alien species is prohibited (Council Regulation (EC) 338/97 (PDF | 3.78 MB)) due to their invasive character and the fact that their introduction has an adverse impact on native species. In addition, the Council of Europe has designed a voluntary code of conduct (PDF | 1.92 MB) to raise awareness within the pet industry and among owners and keepers of pets and provide practical guidance to reduce further the chances of pet species becoming invasive in Europe.
The EU Regulation on invasive alien species entered into force on 1 January 2015. At its core is this list of invasive alien species of Union concern, which has been drawn up on the basis of strict criteria and scientifically robust risk assessments, and approved by a Committee of Member State representatives.
Scientists Identify 66 Alien Species that Pose the Greatest Threat to European Biodiversity (Dec 13, 2018)Natural Environment Research Council (United Kingdom). Centre for Ecology and Hydrology.Scientists have identified 66 alien plant and animal species, not yet established in the European Union, that pose the greatest potential threat to biodiversity and ecosystems in the region. From an initial working list of 329 alien species considered to pose threats to biodiversity recently published by the EU, scientists have derived and agreed a list of eight species considered to be very high risk, 40 considered to be high risk, and 18 considered to be medium risk.
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European Commission. Sixth Framework Programme.
Finland Ministry of Agriculture and Forestry.