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There are more than 450 species of lady beetles in North America. Some are native and some have been introduced from other countries. Most species of lady beetles, also called ladybugs, are brick red or orange with black markings, but they may also be black with red markings. Larvae look like miniature alligators and live up to their appearance by being voracious predators of many garden pests, including aphids, mites, and other small insects.
Though lady beetle larvae are the most voracious eaters, adults also consume pests. Most lady beetles prefer aphids over other food sources, but if aphids are scarce they will feed on other small insects and eggs, as well as pollen and nectar. In a pinch they'll even feed on their own young. The fact that lady beetles have a diverse range of food sources makes them particularly valuable as beneficial insects.
Lady beetles overwinter as adults, often clumped together in hedgerows, beneath leaf litter, under rocks and bark, and in other protected places including buildings.
Non-native lady beetles, in particular the multicolored Asian lady beetle (Harmonia axyridis), have become a nuisance in many parts of the country when large numbers of them find their way indoors to overwinter. It also will prey on native lady beetles as well as pest insects. Our window-mounted Ladybug Buster is an easy, nontoxic way to control invading Asian ladybugs.
Last updated: 5/7/19
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