SEOUL (Reuters) -Residents in and around the South Korean capital Seoul are complaining about swarms of black insects dubbed "lovebugs" covering hiking trails and ambushing people, as rising temperatures due to climate change spur their spread.

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.

South Korea's capital Seoul is currently facing a state-wide pest invation. Small black bugs also known as 'lovebugs' have invaded in various parts of South Korea in millions of numbers. Formally called plecia longiforceps, these bugs are called lovebugs because of their mating behaviour. These bugs fly in pairs attached to each other.