Feeding garden birds is one of the most widespread human-wildlife interactions. The science reveals both genuine benefits and underappreciated risks that can inform better practice.
Garden bird feeding is generally welfare-positive when done well, but the details matter significantly. Contaminated feeders spread fatal diseases through wild populations — trichomonosis in finches and chaffinches has caused population-level declines in the UK. Feeding the wrong foods (salted nuts, bread, cooked rice) causes nutritional problems or drowning risk. Placing feeders near windows or in exposed positions increases collision and predation risk. Done correctly — with clean feeders, species-appropriate food, and appropriate placement — supplementary feeding provides real welfare benefits particularly during cold snaps and early spring when natural food is scarce. The practice also builds public connection to wildlife, supporting conservation attitudes more broadly.