Wild Bird Supplementary Feeding: Welfare Benefits and Risks

Garden bird feeding is one of Britain's most popular wildlife activities, but inappropriate foods and feeders can harm the birds it aims to help.

Key Facts

Approximately half of UK households feed wild birds, with an estimated 60,000 tonnes of bird food purchased annually
Garden feeding provides critical winter food supplementation for species including blue tits, robins, and sparrows
Inappropriate foods including salted nuts, desiccated coconut, and whole peanuts can be harmful or fatal to birds
Dirty feeders spread avian disease including salmonellosis and trichomoniasis - a growing concern for greenfinches
Supplementary feeding has been linked to earlier breeding and improved overwinter survival in several species
Feeding fat balls wrapped in plastic netting causes fatal entanglement injuries to birds and other wildlife

Welfare Considerations

Garden bird feeding done correctly provides genuine welfare benefits, particularly in winter when natural food availability is low. Done poorly, it spreads disease and provides harmful foods. Greenfinch populations in the UK have declined sharply partly due to trichomoniasis spread through shared feeders. Welfare-positive feeding requires appropriate food types, clean feeders, and siting away from cat ambush points. The harm of inappropriate feeding can be invisible until disease events become evident.

What You Can Do

Clean bird feeders every two weeks with hot soapy water and dry thoroughly before refilling
Use quality bird foods appropriate to species - seed mixes, suet, whole nuts in mesh feeders
Remove plastic netting from fat balls before hanging to prevent entanglement
Suspend feeding temporarily if you observe sick birds to prevent disease spread
Site feeders away from windows to reduce collision risk and out of reach of cats