Which species is most active during daylight hours in some populations?

• A. Anopheles gambiae
• B. Culex quinquefasciatus
• C. Aedes albopictus
• D. Psorophora ciliata

Answer: (C)

Daytime biting is a hallmark behavior of Aedes albopictus. This species tends to bite during daylight hours, especially in warm, sunny or shaded outdoor settings, which sets it apart from many other mosquitoes that are more active at dusk, dawn, or night. Its tendency to breed in artificial containers and to rest in outdoor vegetation makes daytime protection and control important. The other species listed are predominantly active later in the day or at night, so they don’t exemplify daylight activity as clearly. Aedes albopictus is the best answer because it is the one most commonly associated with daytime activity in some populations.