Asian Lady Beetle

What it is

Harmonia axyridis, most commonly known as the harlequin, multicolored Asian, or simply Asian ladybeetle, is a large coccinellid beetle. This is one of the most variable species in the world, with an exceptionally wide range of color forms. It is native to eastern Asia, but has been artificially introduced to North America and Europe to control aphids and scale insects. It is now common, well known, and spreading in those regions, and has also established in...

Where and when to find it

Habitat

Found throughout the United States, especially in gardens, agricultural fields, and near homes. They seek shelter indoors in fall.

How to find it

Look on plant leaves for small, round beetles. Also, check around windows and sunny walls in the fall when they seek warmth.

Best time of day

Daytime, spring through fall.

How it lives

What it eats

Aphids, scale insects, and other soft-bodied plant pests.

What eats it

Birds, spiders, and frogs.

Worth knowing

• They can release a stinky yellow liquid as a defense.
• They come in many colors and spot patterns, not just red with black spots.
• They were brought to the US to help control pests.
• Sometimes they gather in large groups inside houses during winter.
• Larvae look like tiny, spiky alligators and also eat aphids.
• Their scientific name 'axyridis' means 'mix up' or 'variety' because of their many forms.

Why it matters

Asian lady beetles are important predators of aphids and other soft-bodied insects. They help protect plants from damage.