Culex quinquefasciatus is originally named Culex pipiens fatigans. Culex mosquitoes is the vector of some diseases such as Japanese Encephalitis (JE) and Lymphatic Filariasis. This species is noticed by the characteristic of brown colored body, the proboscis, thorax, wings, and tarsi are darker than the body. Female Culex quinquefasciatus lay their eggs in the water surface, the eggs stick together formed like a raft containing 100-200 egg in one batch. The eggs don’t survive longer without the water, if the water evaporates before the eggs hatch or the larvae complete the life cycle, they die.

Culex quinquefasciatus is considered as sub-tropical species where can be found in Asia, Australia, Africa, South America, and North America within the latitudes 36° N and 36° S. The habitat of Culex is near of nutrient-rich aquatic environment, including storm-water catch basin, waste water container, and flood water.

Most of Culex mosquitoes is zoophilic, which means this species is tend to feed animal blood, however in certain situation where the animal population is insufficient for mosquito blood feed then the female mosquitoes would obtain blood-feed from human (anthropophilic). Culex quinquefasciatus is nocturnal insect, they actively feed at night. The male and female Culex would sugar feeding from plant nectar between 9 pm – 4 am, and the females start blood-feeding when they start the first gonotrophic cycle after mating.