Economic Importance for Humans: Negative
This species hibernates in groups, and sometimes enters houses in large numbers, looking for a place to spend the winter. They don't bite or damage household goods, but can be a nuisance (Bernard 1994, Fleming 2000, Klaas 1998).
Many different species of ladybugs, including the seven-spotted ladybug, have been brought to North America to be used in biological control of pests. The problem is that some of the imported ladybugs are competing with the local ladybugs for food and habitat, and have displaced the natives in many areas. This can reduce ladybug biodiversity and and my damage local ecosystems (CNF Ladybug Survey 2000, Marshall 2000).
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