Large numbers of insects known as lovebugs (Plecia nearctica) have appeared again in South Korea, especially between late June and early July. These insects are often seen flying in pairs while mating and are also called “honeymoon flies.” First observed in northwestern Seoul in 2022, these seasonal swarms have now spread across many parts of the capital and nearby cities, including Incheon. At Gyeyang Mountain, west of Seoul, clouds of lovebugs were recently seen surrounding observation areas. Local officials reported a notable increase in their population, with workers frequently cleaning piles of dead insects. The Environment Ministry explained that the hot and humid conditions of the 395-meter mountain likely created an ideal environment for the insects to multiply. The ministry plans to evaluate the full extent of this year’s outbreak after the bugs disappear, probably by mid-July.

Although lovebugs do not bite or carry disease, they have caused considerable inconvenience by sticking to vehicles, buildings, and public transport. Government agencies have continued to manage the situation without chemical pesticides, choosing safer methods such as water sprays and adhesive pads. These insects are still considered useful because they help with flower pollination and their larvae convert plant materials into organic matter. Experts believe the escalation in numbers may be related to warming temperatures and climate change. Some researchers view this as part of a broader environmental trend, suggesting the need for a more sustainable and strategic approach to managing future outbreaks.