In 1920 the federal bird banding office was established in the U.S. Known today as the U.S. Geological Survey Bird Banding Laboratory, it works with its Canadian counterpart to run the North American Bird Banding Program, which manages more than 77 million archived banding records and more than five million records of encounters with banded birds from the past 100 years. Traditionally most human encounters with banded birds have been between hunters and waterfowl, according to biologist Danny Bystrak of the Bird Banding Laboratory. OVER THE DECADESThe Bird Banding Laboratory has been curating bird banding records since 1920. ON THE MOVELong-term banding records can show changes in bird populations, behaviors and environments over time.