Even as late as the end of October or early November, the buzz of gnats wakes me up at night. This buzz, caused by their rapidly up and down moving wings, plays an important part in the communication around the mating. Gnat couples are formed through hearing. With a good match, their buzzing sounds in unison: they fly in tune. The female may exert a degree of mate choice by changing her flight-tone to see how well the male follows her, or change frequencies if she wants to “lose” him, for example if she has already mated. (Warren, Gibson, and Russell 2009: 489)
In 2006, British biologists Gabriella Gibson and Ian Russell show, for the first time, interactive auditory behavior between male and female mosquitoes leading to sexual recognition. Individual males and females of the Toxorhynchites brevipalpis both respond to pure tones by altering wing-beat frequency. Each mosquito alters its wing-beat frequency in response to the flight tone of the other, so that within seconds their flight tone frequencies are closely matched, if not completely synchronized (Gibson and Russell 2006: 1311).