The non-native species refers to an introduced species, which is living outside its local distributional range, and has arrived there due to human activity, that is, either accidentally or deliberately. These species can exhibit various influences on the native ecosystem.
There are certain features, which increase the possibility of a non-native species to become an invasive species, that is, the tendency of a species to tolerate a broad range of conditions, consuming large quantities of food, and breeding briskly.