The ladybug is a small reddish or greenish bug, with a smooth surface and black spots. They do not harm humans, nor do they post a health or food threat.
The Asian lady beetle is a predatory lady beetle native to eastern Asia. Lady beetles are often used as a biological control agent targeting soft-bodied insects such as aphids and scales. An adult lady beetle is capable of eating 90-270 aphids per day. Lady beetles are now present across much of North America, with reports as far west as Oregon. In their native Asian environment, lady beetles stay in cracks and crevices of cliffs in the winter, but in many areas of the United States, these beetles become a nuisance when they gather in buildings (because of the lack of warm cliffs). The population boom has probably been caused by the massive abundance of prey and a lack of natural enemies.
The lady bug is attracted to warm, sunny surfaces such as the sides and roofs of buildings, and they accidently enter inside tiny cracks and window runners. Scores of removals have been undertaken, only to have them reappear in less than a day’s time.
Despite our best efforts, it is not uncommon to find them inside. We professionally treat the outside of the cabin and remove any found indoors at every departure. There is no safe treatment indoors other than vaccumming them up!