18 Types of Ladybugs in Maine

Maine has both native ladybugs and species introduced from other regions. Native species evolved here over millennia and filled ecological niches in the state's forests and gardens. The Asian Lady Beetle, introduced to North America in the 1970s for pest control, has become widespread and sometimes outcompetes native species for food. You can distinguish introduced from native species by comparing body shape, spot patterns, and the presence of a pale pronotum with dark spots. Field guides and your local cooperative extension office can help confirm which species you have spotted.

The Seven-spotted Ladybug is Maine's most iconic native ladybug. It measures about 0.3 to 0.4 inches long and has a bright red wing cover with exactly seven black spots arranged in a distinctive pattern. The pronotum, the area just behind the head, is black with two white or cream-colored spots. This orderly spot arrangement makes it one of the easiest species to identify in the field. If you count the spots and find seven in a symmetric pattern, you almost certainly have a Seven-spotted Ladybug.

Asian Lady Beetles have spread throughout Maine since their introduction and thrive in agricultural areas, gardens, and open woodlands. They prefer areas with abundant aphid populations, including crop fields, flowering plants, and shrubby vegetation. In urban and suburban Maine, they congregate on building exteriors, especially in fall when they seek shelter for winter. You are more likely to encounter Asian Lady Beetles in cultivated landscapes than in deep forests. They are active from spring through fall, with populations peaking in late summer and fall.

The Fourteen-spotted Ladybug is smaller and less common than the Seven-spotted in Maine, measuring about 0.2 inches long. It is typically bright yellow or pale orange with fourteen small black spots arranged in rows across its wing covers. The pronotum is pale with dark markings. Its small size and pale coloration distinguish it from the more robust and vibrant Seven-spotted. This species is native to Maine but occurs in lower numbers. You may find them in grasslands, forest edges, and gardens, particularly in areas with diverse wildflower cover.

Some Maine ladybugs, particularly the Asian Lady Beetle, produce audible squeaking sounds when disturbed or handled. This sound serves as a defense mechanism and is produced by vibrating parts of their abdomen. Native species such as the Seven-spotted Ladybug are generally quieter. If you hear a faint squeak from a ladybug in your hand, it is likely an Asian Lady Beetle reacting to the perceived threat. This sound is harmless and simply an insect's way of attempting to deter predators.

Spot count and arrangement are the primary tools for ladybug identification. Native Seven-spotted Ladybugs have seven spots in a fixed, symmetric pattern. Asian Lady Beetles show more variation, ranging from zero to fifteen or more spots, and the number can differ between individuals of the same species. Fourteen-spotted Ladybugs have, as the name suggests, fourteen consistent small spots. When identifying a ladybug, photograph or sketch the spot arrangement, note the base color and pronotum markings, and consult field guides for your region. This methodical approach will narrow down the species quickly.

Maine does not currently list native ladybug species as protected under state law. However, conservation of ladybug habitat benefits all species by maintaining the plants and arthropods they depend on for food. Reducing pesticide use in gardens and leaving some areas unmowed supports natural ladybug populations. The Seven-spotted Ladybug remains common enough in Maine that it does not require formal protection, but habitat preservation ensures its long-term presence in the state.

Maine ladybugs are most visible from late May through September, with peak activity in June, July, and August. During colder months, they enter dormancy or shelter in protected sites such as leaf litter, tree bark crevices, and building cavities. Spring emergence begins in April as temperatures rise and prey populations increase. Fall represents another period of high activity as ladybugs feed intensively to build fat reserves for winter. If you want to observe Maine ladybugs, explore gardens and open areas during these peak months.