Evidence-based guidance on supplementary feeding for wild birds during winter months.
Supplementary bird feeding has evolved from a seasonal pleasure to a significant conservation and welfare intervention as urban and agricultural habitat degradation reduces natural food availability. When done well - with high quality food, regular feeder hygiene, and appropriate feeder designs for target species - supplementary feeding provides genuine welfare benefits during food-scarce periods. However, poorly maintained feeders can spread disease across entire local populations, making hygiene compliance not optional but a welfare obligation for anyone choosing to feed birds. The welfare benefit is conditional on appropriate maintenance.