Multicolored Asian Lady Beetle
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The Multicolored Asian Lady Beetle (Harmonia axyridis) an introduced species, has received considerable attention over the past decade because of its tendency to congregate in large numbers, possibly thousands, during the fall and winter hibernation period.
It often seeks refuge in residential structures, especially walls.
In response to these infestations, the USDA says,
"Preventing the lady beetles from entering is the best approach to keeping them from becoming a household nuisance in fall and winter. Caulking exterior cracks and crevices--before the lady beetles seek overwintering sites-- is the best way to keep them out. This will also keep out other unwanted insects such as wasps, and will save homeowners money on energy costs.".
They also provide information about a system for trapping the insects.
Identifying the Multicolored Asian Lady Beetle can be problematic because of the variation in its colors and spots.
The top picture, for example, shows a specimen with a very faint spot pattern on the wings. The pattern, coupled with the face pattern identify the species.
The bottom picture shows a more common form, with the insect having multiple spots on the wings.
© 2005-2010 Patricia A. Michaels