Mosquitoes are distributed around the world. Adults prefer to inhabit concealed, dark, and poorly ventilated places. Indoors, they often live under beds, behind cabinets, doors, in crevices in walls, as well as in animal pens and basements. Outdoors, they often live in grassy areas, caves, cellars, bridge openings, stone crevices, and other places. Female mosquitoes start sucking blood 2-3 days after eclosion, mostly at night. They do not have strict requirements for their bloodthirsty habits and generally suck animal and human blood. Male mosquitoes do not suck blood and feed on plant sap. Mosquitoes can reproduce 7-8 generations per year. Male mosquitoes have a lifespan of 1-3 weeks, while female mosquitoes have a lifespan of 1-2 months.