What is a Love Bug? A love bug is a nickname for a type of beetle commonly referred to as the ‘Plecia nearctica’ or ‘March Fly.’ These small insects are native to the southeastern United States and are most commonly found in Florida and other nearby states. Love bugs are known for their distinctive black-and-red coloring and for their incredibly dense swarms, which can be quite a nuisance for drivers. Though they don’t bite, sting, or cause any other harm, love bugs can be a nuisance due to their sheer numbers.