Insects have remarkable methods of finding mates in their environment. Insects are known to use odors, sounds and light. Researchers* have discovered that blow fly vision is important in mate recognition. Young female blowflies are heavier than males and their wings beat at 178 Hz compared to 212 Hz for the males. When the female wings beat, they reflect light that creates a flash pattern of 178 Hz. Male blow flies are responsive to light, but are much more responsive to flashing light. The males are most responsive to lights flashing at 178 Hz which mimics the female.
*Courtney Eichorn, Michael Hrabar, Emma C. Van Ryn, Bekka S. Brodie, Adam J. Blake and Gerhard Gries. How flies are flirting on the fly. BMC Biology 2017 15:2