Highway-ecology
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Plecia nearctica
lovebug, honeymoon fly, double-headed bug
Plecia nearctica, commonly known as the lovebug or honeymoon fly, is a march fly (family Bibionidae) native to parts of Central America and the southeastern United States. The species is renowned for its mass synchronous emergences of adults, which form conspicuous mating swarms along highways and roads. Males and females remain coupled in copula for 2–3 days, often flying while attached. Adults do not feed and rely entirely on fat reserves accumulated during larval development. The species has expanded its range northward since its original description from Louisiana and Mississippi in 1940.