Mosquitoe larvae feed on bacteria that grow on fine organic particles, such as those produced by decomposing plants. Plants decompose so slowly here that mosquitoes have a smorgasbord of goodies from which to choose. While we tend to think of mosquitoes as bloodsuckers thriving on our red corpuscles, mosquitoes also delicately sip on nectar. Both males and females will sip nectar from willows, flowers and other plants to get the energy they need to fly. Also many kinds of mosquitoes rarely attack humans, feeding on birds or other animals instead.
Female mosquitoes look for a red-blooded victim after mating.
While some mosquitoes can produce eggs without a blood meal, for most of the common varieties of mosquitoes, no blood means no eggs. The general rule is that if they get a complete blood meal, they develop a complete egg batch and deposit it. Male mosquitoes swarm when it is time to mate. When females enter these living clouds, the males recognize them by the vibrations of their wingbeats, and they are all humming in the same key. If you have perfect pitch, you can attract the males, or you could use a tuning fork to attract them.