Widely known as the “ladybug,” Asian lady beetles look similar to other ladybird beetles that occur on backyard flowers and shrubs, coming in a variety of colors. This species has the habit of gathering around houses in large numbers in fall. They form in large aggregations on the sunny side of the house in late afternoon.
During summer, Asian lady beetles live on plants and feed on aphids and other insects that are pests of flowers and shrubs. In fall, the individuals from the plants around the house and from nearby areas come together to spend the winter in a protected location. The result of this behavior can be small or large gatherings of these beetles in one place, often inside houses and other covered areas.
The first signs of a potential problem are Asian lady beetles resting on the south and west facing side of the house in fall. These few individuals may be just the start and have the potential to be joined by many others in the following days or weeks. Fortunately, you don’t have to worry about these beetles causing damage or laying eggs in your home.