This species is the primary vector of several arboviral diseases in the Southern United States, most particularly West Nile virus, and fiariasis in India. It is a strong-winged domestic species seen all over India in and around human dwellings. Rapid urbanization and industrialization without adequate drainage facilities are responsible for its increased dispersal. Upon emergence, adult females prefer obtaining blood from birds, but as they age, the species is highly anthropophilic (they prefer human blood). They enter the houses at dusk and reach maximum density by midnight. The peak biting time is at midnight. Legs, particularly below the knee, are the preferred biting sites. During the day, it may be seen resting indoors on walls, underneath furniture, hanging cloths in dark corners, or in closets/wardrobes/cupboards. (Wikipedia 2012)