description Harlequin Ladybird Overview
The harlequin ladybird, Harmonia axyridis, is a highly variable ladybird species native to eastern Asia. It was introduced elsewhere as a biological control agent because both adults and larvae consume aphids, but it subsequently became invasive across parts of Europe, North America, and other regions. Its broad diet and ability to compete with or prey upon other ladybirds can affect native insect communities, and adults often gather inside buildings to overwinter.
help Harlequin Ladybird FAQ
How can I identify a harlequin ladybird if its color and spots vary?
Harmonia axyridis is highly variable, with adults showing different red, orange, yellow, and black patterns rather than one fixed spot design. It is native to eastern Asia and is also called the Asian lady beetle in North America. [INRAE species profile](https://eng-encyclopedie-pucerons.hub.inrae.fr/species/insect-predators/coleoptera-coccinellidae/harmonia-axyridis)
Why was the harlequin ladybird introduced, and why is it now considered invasive?
It was introduced as biological pest control because both adults and larvae eat aphids. Its broad diet and rapid spread have allowed it to become invasive in parts of Europe and North America, where it can compete with native ladybirds.
Is the harlequin ladybird the same insect as the Asian lady beetle?
Yes. Harlequin ladybird, Asian lady beetle, and multicolored Asian lady beetle are common names for Harmonia axyridis, although regional usage differs.
What does Harmonia axyridis eat besides aphids?
It also eats other soft-bodied insects and may prey on the eggs or larvae of native ladybirds when prey is scarce. That broad diet is one reason the species can affect local ladybird communities.
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