Bug zappers don’t focus on mosquitos. They focus on bugs attracted to light. Mosquitos aren’t particularly attracted to light. They are attracted to body heat and, most particularly, carbon dioxide. Our exhalations draw them near. Then the heat from the veins close to the skin’s surface provide the fine tuned target. So, to attract mosquitos, emit carbon dioxide which then draws near to a body temperature heat source, which then zaps or drowns them. This drowning is accomplished by having the mosquitos attracted to a suction which then blows them into water with a bit of soap in it.