Based on an article I've read, I believe that mosquitoes are attracted by body heat. I've confirmed this by experience. When I am in a place where there were plenty of mosquitoes, they hover over my head where the heat from the lower parts of the body collect. The mosquitoes also go to parts of my arm and leg warmed by my blood.. Another factor that attracts mosquitoes, again based on my own observation, is sound. When I hum, the mosquitoes come to my face.
Another factor that attracts mosquitoes, again based on my own observation, is sound. When I hum, the mosquitoes come to my face.