Asian Lady Beetles in Central Virginia: The Overwintering Invasion

Richmond Virginia is currently experiencing a phenomenon that might make you think your home is under ladybug siege. But, upon closer inspection, you’ll find that these invaders are not your everyday ladybugs; they are Asian lady beetles. In this blog post, we’ll delve into the intriguing behavior of Asian lady beetles during winter, why they are everywhere in Richmond to Williamsburg right now, and how to deal with this seasonal invasion.

Overwintering Behavior

Asian lady beetles, scientifically known as Harmonia axyridis, exhibit a unique overwintering behavior that sets them apart from their native counterparts. As temperatures drop, these beetles seek refuge from the cold by congregating in large numbers in protected spaces. In Central Virginia, this behavior usually takes place from late September through November.

Why They Are Everywhere Right Now

The reason for the surge of Asian lady beetles in Central Virginia during the fall and early winter is two-fold:
    • The Search for Shelter
As temperatures begin to plummet, Asian lady beetles start searching for suitable overwintering sites. Homes, especially those with light-colored exteriors, become prime targets due to the warmth they offer.
    • Mass Aggregation
These beetles have a tendency to aggregate, forming clusters of hundreds or even thousands. When one Asian lady beetle finds a cozy nook in your home, it releases a pheromone that attracts others, leading to massive gatherings.

Dealing with the Invasion

If you’re finding yourself inundated with Asian lady beetles in Central Virginia right now, there are ways to deal with this seasonal invasion:
    • Sealing Entry Points
Thoroughly inspect your home for gaps, cracks, and openings, and seal them to prevent lady beetles from entering.
    • Window Screens
Ensure your window screens are secure to prevent beetles from sneaking inside.
    • Vacuuming
If lady beetles have already invaded your living spaces, use a vacuum cleaner to gently collect and release them outdoors. Avoid crushing them, as their defensive secretions can emit an unpleasant odor.
    • Professional Pest Control
If the problem is overwhelming, consider enlisting the help of Cobalt Pest Control as we specialize in managing Asian lady beetles and other overwintering pests such as stink bugs.


Asian lady beetles’ overwintering behavior has made them a common sight in Richmond during the fall and early winter. While they can be a nuisance when they infiltrate homes in large numbers, understanding their behavior and employing preventive measures can help you manage this seasonal invasion. Richmond and Williamsburg, take comfort in knowing that these lady beetles are simply seeking warmth and shelter during the colder months, and with the right approach, we can keep you home protected from these cute but irritating bugs.

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