Seoul residents are grappling with an invasion of ‘lovebugs’ that have swarmed hiking trails and urban areas across the South Korean capital. Viral footage shared on social media shows Gyeyangsan mountain in Incheon, west of Seoul, with hiking trails and observation decks carpeted black with the insects. The bugs, officially called Plecia longiforceps, earned their nickname from their distinctive mating behaviour, flying attached as couples during copulation