Wild Bird Supplementary Feeding - Evidence and Best Practice

Feeding wild birds is a popular practice with genuine welfare benefits, but it also carries risks that require thoughtful management to avoid harm.

Key Facts

An estimated 55% of UK households feed garden birds, making it one of the most common wildlife interactions
Supplementary feeding can significantly aid survival during cold winters when natural food is scarce
Improperly managed feeding stations can spread diseases including Trichomonosis, Salmonellosis, and Finch eye disease
Inappropriate foods such as dry rice, salted peanuts, or mouldy bread can harm birds
Feeders left in the same position for years accumulate pathogens in surrounding soil and vegetation
Cats predating near garden feeding stations is a significant mortality risk for small birds

Welfare Considerations

Supplementary feeding creates positive welfare outcomes for individual birds, particularly during harsh weather, but requires active management to avoid disease transmission and other harms. The British Trust for Ornithology and RSPB recommend regular cleaning of feeders with disinfectant, rotating feeder positions annually, and using quality foods appropriate to target species. The net effect of the practice on population-level welfare is complex and varies by species and season. Done well, it represents a meaningful way for individuals to support local wildlife.

What You Can Do

Clean bird feeders at least monthly with a weak disinfectant solution
Use quality bird foods appropriate to your local species
Rotate feeder positions annually to prevent pathogen build-up
Position feeders to reduce cat predation risk, ideally 2 metres from cover