The lovebug (Plecia nearctica) is a species of march fly found in parts of Central America and the southeastern United States, especially along the Gulf Coast. It is also known as the honeymoon fly or double-headed bug.

As for lovebugs looking strange when flying together attached, they are actually mating. During the mating process, the male lovebug attaches to the female lovebug and only disengages during the daytime while resting on vegetation never during flight or at night, Fasulo said. Successful mating takes as much as 12 hours, and the female lovebug dies within 86 hours of laying eggs.

Lovebugs' larvae feed on partially decayed vegetation in the landscape and, in this respect, are beneficial to humans. Adults primarily feed on nectar from various plants, particularly sweet clover, goldenrod, and Brazilian pepper. The lovebug is considered a nuisance by many motorists, especially in Florida, due to its swarming behavior during the species' mating season.

Love bug swarms can become so dense that they can reduce visibility for drivers on the road. It’s important that you take particular care when driving in May and September, which are their main breeding months. Some areas may have signs warning you that bug swarms are possible.