Scientists from Georgia Tech and MIT have developed a mathematical model explaining how female Aedes aegypti mosquitoes navigate to humans. The study shows insects respond independently to dark visual cues and carbon dioxide rather than following each other. Findings could improve mosquito traps and disease control.
Researchers from Georgia Tech and the Massachusetts Institute of Technology analyzed 20 million data points from hundreds of mosquitoes swarming a human subject. Using 3D infrared cameras in a controlled chamber, they tracked female Aedes aegypti mosquitoes, known as yellow fever mosquitoes and common in the southeastern United States, California, and worldwide. These insects transmit diseases like malaria, yellow fever, and Zika, causing over 700,000 deaths annually. The team published their work in Science Advances in 2026 (DOI: 10.1126/sciadv.adz7063). They also created an interactive website for exploring mosquito behavior. The model reveals mosquitoes do not follow one another but react individually to environmental signals, clustering coincidentally. David Hu, a Georgia Tech professor in mechanical engineering and biological sciences, compared it to a crowded bar: customers arrive independently due to shared attractions like drinks and music. Experiments varied visual targets and CO2 levels. A black sphere attracted approaching mosquitoes, but they rarely lingered. A white object with CO2 drew them only at close range, prompting brief pauses. Combining a black object and CO2 produced the strongest response: swarming, lingering, and feeding attempts. Christopher Zuo, a former Georgia Tech master's student, noted: They're like little robots. We just had to figure out their rules. In human tests, Zuo wore outfits of different colors— all black, all white, or mixed—with arms extended. Cameras recorded paths analyzed at MIT. Mosquitoes clustered most around his head and shoulders, typical targets for the species. Co-authors include Soohwan Kim, Chenyi Fei, Alexander Cohen, and Ring Carde. Zuo suggested intermittent traps mimicking cues, as mosquitoes do not persist without both signals.
