HMANA collects hawk count data from almost two hundred affiliated raptor monitoring sites throughout the United States, Canada, and Mexico. HMANA was founded in 1974 and is a driving force behind the Raptor Population Index (RPI) to promote scientific analysis of hawk count data. Many HMANA sites have also collected migrating Monarch data for many years. In 2019, HMANA and MonarchNet partnered to further promote and develop improved methodology for reporting Monarch data from hawk migration observation sites.