Bird banding (also known as bird ringing) is one of the most effective ways to study the biology, behavior, movement, longevity, breeding productivity, sources of mortality, and population demographics of birds. Additionally, according to the USGS, data collected from bird banding is used to "monitor populations, set hunting regulations, restore endangered species, study effects of environmental contaminants, and address such issues as Avian Influenza, bird hazards at airports, and crop depredations."