Asian Lady Beetle

Harmonia axyridis is a lady beetle, ladybug, or ladybird species that is most commonly known as the harlequin, Asian, or multicolored Asian lady beetle. This is one of the most variable lady beetle species in the world, with an exceptionally wide range of color forms. It is native to eastern Asia, and 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 become established in Africa and widely across South America.

This species is conspicuous in North America, where it may locally be known as the Halloween beetle, as it often invades homes during October to overwinter. Other names include multivariate, southern, Japanese, and pumpkin ladybird. Like other coccinellid beetles, this species may interchangeably be referred to as a lady beetle, ladybug, or ladybird, though entomologists prefer the names ladybird beetles or lady beetles to avoid confusion with true bugs. A widespread misconception exists that this species is not a ladybug due to confusion over common names.