Bugs. The ecosystem can't survive without them, but they sure do know how to ruin a good time. Roasting (and eating lots of) s'mores is less fun when bugs are biting you, but summer fun after sundown ...

Above: A harmless hover fly feeding on sweaty skin. These flies appear in mid- to late-summer. The 1860s song of this title has retained some popularity through the years. Who has not been annoyed by ...