For as long as the tallgrass prairie blooms have blown in the breeze and the muddy Missouri flowed past its western border, the land we call Iowa has been stewarded and cared for by people. From the variety of Native cultures that have called this land home to the 20th century advocates who fought for its protection and care amid unprecedented exploitation, thousands of influential voices have fought to protect this land and its diversity. This article features a few of those voices that have been influential in the care of Iowa's Nature and who set an example for future generations to follow in protecting the rich natural heritage we all inherit. The Iowa’s Nature series was a collaborative project between Iowa State University Extension and Outreach, the Iowa Association of Naturalists, and the Iowa Department of Natural Resources with support from the Resource Enhancement and Protection Program. To learn more about the project, visit https://naturalresources.extension.iastate.edu/Iowas-Nature