What are alien and invasive alien species?
Across the world, many species of plants, animals and even micro-organisms have moved beyond their native range and habitat only to become established in a completely new location. Sometimes species commonly found in one part of Canada become established outside their natural range in another region of the country where they have not historically been found. Most however, come from outside Canada and were relocated as a result of human activity. Species that have become established in areas outside their natural range are known as “alien species”. Generally, alien species do not pose a significant risk and many are even beneficial. However; when alien species are capable of causing significant harm to our environment, the economy or to society, they are referred to as “invasive alien species”. Canada has many examples of both invasive alien species and alien species. A few examples are shown below.
