Evidence-Based Wild Bird Feeding

Supplementary feeding of wild birds can benefit individual welfare but requires attention to hygiene, food type, and placement to avoid harm.

Key Facts

Over half of UK households feed wild birds, spending an estimated 200 million pounds annually on bird food
Dirty feeders spread Salmonella, trichomoniasis, and E.coli among garden birds
Xylitol-containing peanut butter and heavily salted foods are toxic to birds
Supplementary feeding benefits survival during cold winters and breeding season
High-energy foods including sunflower hearts, suet, and nyjer seed provide maximum nutritional benefit

Welfare Considerations

Garden bird feeding provides genuine welfare benefits during winter food shortages and cold snaps, but poorly maintained feeders can spread fatal diseases through bird populations. Trichomoniasis from dirty feeders has caused major chaffinch and greenfinch population declines in the UK. Clean feeders with appropriate food types and strategic placement away from predator ambush positions maximise welfare benefit. Feeding during drought conditions by providing water is equally important.

What You Can Do

Clean bird feeders and tables with a 5% disinfectant solution at least monthly
Remove and replace uneaten food promptly to prevent mould and disease
Provide clean fresh water in a shallow dish alongside food
Use species-appropriate foods and avoid xylitol, salt, and cooked foods