Wild bird feeding is practiced by hundreds of millions of people worldwide. Done well, it genuinely benefits bird welfare; done poorly, it can spread disease and create dependency. Evidence guides best practice.
Bird feeding at its best provides genuine welfare benefits: supplementary energy during cold periods, reduced foraging time and predation exposure, and nutritional support during breeding season. However, feeders concentrate birds in ways that create disease transmission opportunities not experienced in the wild. Poorly maintained feeders become vectors for infections that spread rapidly through local bird populations, causing significant suffering and mortality. The responsibility of a feeder provider extends to hygiene maintenance that prevents feeders from harming the birds they are intended to help. Regular cleaning with appropriate disinfectants transforms feeders from potential disease vectors into genuine welfare contributions.