Using high altitude color infrared photographic records of 2 Michigan counties obtained from the National Aeronautical and Space Administration, together with photointerpretations provided by the remote sensing project, Michigan State University, a detailed map of mosquito breeding sites present in a newly formed mosquito control district was prepared in a relatively brief time and with a minimal expenditure of manpower. By combining these data with population densities determined in an unrelated health services study, the Saginaw-Bay county mosquito control district developed an area treatment priority system for their control operations. Additional ongoing and planned cooperative studies, using a variety of remote sensing data sources, are discussed.