Bird feeding stations provide significant welfare benefits for wild birds when managed hygienically and with appropriate food, but can also create harm if mismanaged.
Bird feeding stations concentrate individual birds that would otherwise spread across landscapes, creating conditions for disease transmission. Poorly cleaned feeders develop mold, bacteria, and parasites that sicken and kill the birds they were intended to help. Trichomoniasis spread through contaminated feeders has caused serious declines in UK greenfinch populations - a direct welfare and conservation harm from well-intentioned feeding. Properly managed feeders with regular cleaning, appropriate food, and safe placement provide genuine welfare benefits through supplemental nutrition during critical periods without the disease transmission risks of poor management.