Asian Lady Beetle
From U of I Wiki
The Asian Lady Beetle, sometimes known as the Halloween lady beetle or the Japanese lady beetle, is a yellow-orange ladybug that is often seen in large congregations near the end of October. As many as several thousand adult beetles have been found congregating outside on windows, doors, porch decks, etc., often getting indoors as well and creating a nuisance. The beetle is native to Japan. The Asian lady beetle does not bite, sting, carry human diseases or feed on wood, clothing or food; they also do not reproduce indoors. In spite of annoying populations, these insects are considered beneficial to agriculture and garden landscapes because they feed on harmful aphids and some scale insects associated with trees, shrubs, bushes, low growing ornamentals, roses, wheat, cotton, tobacco, pecans and other crops.
