Does that make them easier to swat?
That buzzing you hear is likely from a female mosquito. They need to find a blood meal after mating in order to have enough energy to produce eggs. From a distance, female mosquitoes cue in on carbon dioxide that we exhale in conical plumes from our bodies, says Dr. Michael Riehle, professor of entomology at the University of Arizona and BIO5 member. The carbon dioxide stimulates the female mosquito to start host-seeking, flying back and forth to follow that concentration gradient back to the source. The buzzing in your ear is mostly just a side effect of the mosquito's wings beating. The sound doesn't have a long-range, so you notice it most when they are flying around your ears.