Explanation

An introduced, alien, exotic, non-indigenous or non-native species. Is a species living outside its native distributional range, which has arrived there by human activity, either deliberate or accidental. Some introduced species are damaging to the ecosystem they are introduced into, others have no negative effect and can, in fact, be beneficial as an alternative to pesticides in agriculture. In some instances the potential for being beneficial or detrimental in the long run remains unknown