Garden bird feeding is one of the most widespread wildlife welfare interventions. Done well, it supports bird health; done poorly, it can spread disease and cause harm. Understanding best practice matters.
Garden bird feeding, when conducted with care, is a genuine welfare intervention that supports wild bird populations through resource-limited periods. When conducted carelessly, it can spread devastating diseases through dirty feeders and water containers. The Trichomonosis outbreak that has severely reduced greenfinch and chaffinch populations in the UK is a direct consequence of inadequate feeder hygiene in widespread garden feeding networks. Good practice is simple: clean feeders weekly with a dilute disinfectant solution, position feeders to reduce disease transmission and predation risk, provide appropriate high-quality food rather than cheap seed mixes, and supply clean water changed daily. These straightforward actions transform garden feeding from a potentially harmful practice into a genuine welfare benefit for urban bird communities.