An introduced species is rarely an entirely good thing, even if its introduction was intentional. When you take an animal or plant out of the habitat it evolved in and put it somewhere else, bad things usually happen, often to other species that live in the new habitat. Take, for example, Asian lady beetles, which were introduced intentionally in America to control aphids and other garden pests. Mostly they do their job, each one spending the summer snacking on thousands of aphids that would otherwise conspire to destroy crops. And then October comes, the weather cools down, and suddenly Asian beetles cluster en masse on and in our houses, looking for a warm place to spend the winter. This is one of those bad things introduced species do to other species around them. They annoy us. So if you have getting rid of Asian beetles on your mind, I understand. I also want to help; my new article, How to Get Rid of Asian Beetles, is full of tips for keeping these beneficial but pesky insects out of your personal space.