Urban waterfowl populations are affected by public feeding practices and habitat quality. Understanding appropriate interactions and welfare impacts helps urban wildlife supporters.
Urban duck populations face welfare challenges from well-intentioned but harmful public feeding practices. Bread and processed food fed in large quantities causes the developmental malformation angel wing in ducklings exposed during the growth phase, permanently preventing flight and independence. Excessive feeding creates unnaturally dense populations that cause habitat degradation, water quality deterioration, and disease outbreaks including botulism. The paradox is that people feeding ducks out of care cause welfare harm through inappropriate food and overpopulation. Education about appropriate food choices and the importance of limiting feeding quantity converts harmful kindness into genuine welfare benefit.