Asian Lady Beetles
Harmonia axyridis
Asian lady beetles look similar to native ladybugs but have distinguishing features: a black "M" or "W" shape behind the head, and coloring ranging from pale orange to bright red with zero to many spo...
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How to Identify Asian Lady Beetles
Asian lady beetles look similar to native ladybugs but have distinguishing features: a black "M" or "W" shape behind the head, and coloring ranging from pale orange to bright red with zero to many spots. They congregate in much larger numbers than native species and bite more readily.
Asian lady beetles look similar to native ladybugs but have distinguishing features: a black "M" or "W" shape behind the head, and coloring ranging from pale orange to bright red with zero to many spots. They congregate in much larger numbers than native species and bite more readily.
Asian Lady Beetles Behavior & Habits
Understanding how asian lady beetles behave helps prevent infestations
Originally imported for pest control, Asian lady beetles have become nuisance pests themselves. In fall, massive aggregations form on warm, light-colored buildings before entering to overwinter. They can bite when handled (unlike native ladybugs) and release an unpleasant-smelling defensive secretion.
Asian Lady Beetles Risks & Dangers
What asian lady beetles can do to your health and property
Health Risks
Asian lady beetles can bite—while not dangerous, it's surprisingly painful for their size. Their secretions can cause allergic reactions in some people, including respiratory issues when large numbers are present indoors.
Property Damage
Their secretions can stain light-colored surfaces and fabrics. Large die-offs attract other pests like carpet beetles.
Signs of Asian Lady Beetles Infestation
Look for these indicators in your home
Asian Lady Beetles in Boise & the Treasure Valley
Asian lady beetles are established throughout the Treasure Valley and cause significant nuisance problems in fall. South and west-facing light-colored homes experience the heaviest congregations. They're especially common in rural and semi-rural areas.
How We Eliminate Asian Lady Beetles
Professional treatment for complete elimination
Asian lady beetle control mirrors stink bug treatment: preventive exterior treatment in early fall, exclusion work, and interior vacuuming. The goal is preventing entry rather than killing beneficial beetles outdoors.
How to Prevent Asian Lady Beetles
Steps you can take to reduce the risk of infestation
Asian Lady Beetles Questions Answered
Common questions about identification, prevention, and treatment
Are these ladybugs or something else?
Asian lady beetles are related to ladybugs but are more variable in color, have an "M" shape behind their head, congregate in huge numbers, and can bite. Native ladybugs don't invade homes in large numbers.
Similar Pests
Learn about other pests in this category