SEOUL, South Korea -- Swarms of “lovebugs” are back in South Korea, blanketing a mountain peak, entering houses and sticking to car windows. Flying attached to one another while mating, the insects, known to scientists as Plecia nearctica, are also called united bugs, double-headed bugs or honeymoon flies.

People in Seoul, the capital of South Korea, are dealing with a big bug problem. Strange black insects nicknamed lovebugs have shown up all over the city - especially in parks and hiking areas. Some paths are completely covered in them.