Northern Prairie Wildlife Research Center
Nest success rate is a critical determinant of duck production and size of the fall flight (Cowardin and Johnson 1979, Johnson et al. 1987). Mortality of females, which is inversely related to nest success, and mortality of ducklings are also important factors.
The purpose of our study was to make regional estimates of nest success of mallard, gadwall, blue-winged teal, northern shoveler, and northern pintail from >15,000 records of nests found in the United States portion of the Prairie Pothole Region (Fig. 1). Supplemental information on breeding population levels, nesting habitat availability, and habitat use by nesting ducks was also collected to account for differences among species and to overcome unrepresentative sampling efforts among regions, habitats, and time periods.
We acknowledge the numerous cooperators who contributed nest records for entry into the Northern Prairie Wildlife Research Center (NPWRC) nest record file, particularly personnel of NPWRC, National Wildlife Refuges and Wetland Management Districts, Mid-Continent Waterfowl Management Unit, and state wildlife agencies in the Central Flyway. K. F. Higgins, H. W. Miller, M. J. Rabenberg, and A. B. Sargeant reviewed the manuscript.