The term 'mosquito cousin' is a reference to the GNAT, which is a small flying insect that is related to the mosquito. Gnats are typically found in warm, humid climates and can be a nuisance due to their tendency to swarm around people. They are usually less than 4 millimeters in length and have wings that are transparent or slightly tinted. Gnats feed on nectar and other small insects, and they can also bite humans.