What's That Bug? does not endorse extermination

We just photographed this yellow ladybird beetle which just emerged from the pupa. By the next day, it had turned orange with black spots.

Are these Ladybugs?Your site is very cool. I have a question for you. We have had some lady bugs living inside our home during the winter months for several years and we were not bothered by them, in fact, we thought them to be kind of cute. However, its seems that a new species of lady bug has arrived and these are different than the ones we are used to. The ways they are different: 1) more light orange in color. 2) they smell and stain if smashed. 3.) They appear to have a slightly different shaped head than the red lady bugs. 4.) They have been aggressive and even BITE. Are these lady bugs at all or some other beetle? (If they are not lady bugs- where did they originate? When did they arrive here in Pennsylvania and- Are they able to reproduce with ladybugs? Are they in competition with them? Will they overtake the niche of our regular lady bugs?) Thanks for your answers!!!


Dear Lori,
We have information on the Asian Ladybird Beetle, (Harmonia axyridis) which can become a "nuisance when large numbers begin crawling on windows, walls, light fixtures, and other indoor surfaces. When disturbed, they also secrete a foul-smelling orange-colored fluid that can spot and stain walls, carpeting, and other surfaces….
Because the Asian lady beetle is a tree-dwelling insect, homes and buildings in forested areas are especially prone to infestation. Suburban and landscaped industrial settings adjacent to wooded areas have also had large lady beetle aggregations. Once the beetles land on the sunny side of the building, they attempt to locate cracks and other dark openings for hibernation sites. These locations may ultimately be on any side of the structure. Common overwintering sites include cracks and crevices around window and door frames, porches, garages and outbuildings, beneath exterior siding and roof shingles, and within wall voids, attics, and soffits. Structures in poor repair or with many cracks and openings are especially vulnerable to problems."
Large aggregations began to be reported from your area beginning aroung 1993. They will not breed with our native Lady Bird Beetles and there is a good chance they are in competition with them.

What's That Bug? does not endorse extermination

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