People United States of America Colleen Helgeson Nelson peoplepill id: colleen-helgeson-nelsonCHN 15 views today 15 views this weekAmerican ecologist who published Downy Waterfowl of North America by Delta Station PressColleen Helgeson NelsonBiographyBibliography (1)ListsAlso ViewedThe worksBooksSources:Openlibrary1993The downy waterfowl of North AmericaAuthors:Colleen Helgeson NelsonFrom our partnersSponsoredColleen Helgeson Nelson