Several factors contribute to the increased activity of these insects during the evening and nighttime hours. These involve environmental conditions, predation risks, and host availability, which collectively influence their behavioral patterns.
Avoiding the intense heat of the day is a significant driver. High temperatures can lead to dehydration and reduced activity levels. Lower nocturnal temperatures offer a more favorable environment for flight and foraging. Furthermore, decreased predation pressure from diurnal predators provides a safer environment for seeking blood meals. The availability of hosts, both animal and human, often peaks during these hours as well.