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. During and after mating, matured pairs remain together, even in flight, for up to several days. The species was first described in 1940 by D. E. Hardy, but was seen in Louisiana as early as 1911. At that time, he reported the incidence of lovebugs to be widespread, but most common in Texas, Florida, Alabama, Mississippi, and Louisiana. However, by the end of the 20th century the species had spread heavily to all areas bordering the Gulf of Mexico, as well as Georgia and South Carolina. They are also present in other countries including Australia. L. A. Hetrick, writing in 1970, found the bug was also widespread in central and northern Florida and described its flights as reaching altitudes of and extending several kilometers over the Gulf. 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. Semi-annual pest status Localized lovebug flights can number in the millions. Male/female pairs (joined tail-to-tail) will hover in the air, drifting slowly. Two major flights occur each year; the spring flight occurs during late April and May, and the summer flight occurs during late August and September. Flights extend over periods of four to five weeks. In south Florida, a third (but smaller) flight can occur in December. Mating takes place almost immediately after emergence of the females. Adult females live only three to four days, while males live a little longer. They have to stick to each other at all times. This species' reputation as a public nuisance is due not to any bite or sting (it is incapable of either), but to its slightly acidic body chemistry. There are no health risks to humans, as disease cannot be transmitted through them. Because airborne lovebugs can exist in enormous numbers near highways, they die in large numbers on automobile windshields, hoods, and radiator grilles when vehicles travel at highway speeds. If left for more than an hour or two, the remains become extremely difficult to remove. Their body chemistry has a nearly neutral 6.5 pH but may become acidic at 4.25 pH