I guess there are examples of where that's not the case, but for our definition, if it goes outside its regular range and it meets the criteria for the impacts, then we consider it to be invasive. If it's already native to the area and it also has a significant impact, such as spruce budworm, we wouldn't consider that to be invasive, because it's within its natural area.
On October 2nd, 2018. See this statement in context.