A collaborative project led by USGS researchers at the Georgia Cooperative Fish and Wildlife Research Unit, University of Georgia, and National Aeronautics and Space Administration (NASA) explores when and where waterfowl (ducks, geese, and swans) move most. Wild waterfowl are among the natural hosts of low-pathogenic avian influenza viruses, which do not cause illness in poultry or humans, but they also play a role in the spread of highly pathogenic avian influenza. Understanding why, where, and when they move can help predict viral spread.