Chart 1 — Grouped Bar Chart
Day vs Night: Environmental Favorability for Mosquito Activity
Favorability score (0–10) for five key environmental factors across daytime and nighttime conditions. Higher scores indicate conditions more favorable for mosquito host-seeking. Nighttime consistently scores higher across every factor — driven by temperature, humidity, and calm air, not lighting.
Night Dominates
All 5 environmental factors score higher at night — not because of light, but temperature and humidity
CO₂ Plumes
Calmer nighttime air keeps CO₂ and odor plumes concentrated — making hosts far easier to track
Not Light
Light favorability is neutral — mosquitoes hunt by smell and heat, not illumination
Sources: CDC, WHO, Journal of Medical Entomology, university vector biology research