Only female mosquitoes have the mouthparts for sucking blood, which they use more as a source of protein for their eggs than for personal nourishment. Males seek nectar and other plant sugars, with which some females may also supplement their diets. Male mosquitoes of a few species do approach humans or other warm-blooded animals, but not to feed on them; they are awaiting the arrival of hungry females to mate with. Otherwise males of most species swarm.
