Do bug zappers really work on mosquitoes? Well, generally, bug zappers attract insects using an ultraviolet light. There is a mesh cage that surrounds the light fixture that is energized with a low voltage current.
What happens is that insects are attracted to the UV light that makes them attempt to pass through the electrified mesh. Once inside they are subsequently electrocuted. You will find that most bug zappers are designed to have a collection tray that accumulates all the dead insects.