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How to Feed Garden Birds in the UK: A Complete Guide

The UK is home to millions of garden bird feeders, and supplementary feeding provides genuine benefit to bird populations throughout the year. Knowing what to feed, what to avoid, and how to keep feeding stations hygienic helps birds — rather than inadvertently harming them.

What Foods Are Safe to Feed Garden Birds?

The most beneficial foods for UK garden birds include black sunflower seeds and sunflower hearts (high energy, eaten by a wide range of species), nyjer seeds (particularly valued by goldfinches), suet pellets and fat balls (excellent winter energy sources), peanuts (in mesh feeders only — whole peanuts can choke nestlings), mixed seed blends (choose those without added wheat or oats, which mostly go to waste), and mealworms (live or dried, particularly important during the breeding season for robins, thrushes, and starlings).

Fresh fruit — apples, pears, and berries — is appreciated by thrushes, blackbirds, and fieldfares, particularly in winter. Mild, unsalted cheese in small amounts attracts robins and wrens. Cooked rice (plain, without salt or sauce) and porridge oats (dry or with water, not with milk) can be offered occasionally.

Most food sold by reputable bird food suppliers in the UK is suitable. The RSPB sells a range of tested bird foods and publishes regularly updated guidance on appropriate feeding.

What NOT to Feed Garden Birds

Several foods that many people assume are safe are actually harmful to birds. Bread — a traditional favourite — has minimal nutritional value and can cause a condition called angel wing in wildfowl, and fills birds' stomachs without meeting their energy needs. While a small amount of wholemeal bread occasionally is not catastrophic, it should not be a regular part of bird feeding.

Salted or flavoured peanuts, crisps, and processed snacks are harmful — excess salt damages birds' kidneys. Desiccated coconut should be avoided as it expands in a bird's stomach. Avocado, chocolate, and onion are toxic to birds. Milk should never be offered — birds are lactose intolerant. Whole peanuts placed where nestlings can reach them are a choking hazard; always use a mesh feeder.

Fat balls in nylon mesh bags should be removed from the net and placed in a suitable cage feeder — small birds can get their feet or beaks trapped in the nylon mesh. Spoiled or mouldy food should be removed immediately, as it can cause serious fungal respiratory infections (aspergillosis) in birds.

Year-Round vs Seasonal Feeding

Garden bird feeding was traditionally considered a winter activity, but the RSPB and BTO (British Trust for Ornithology) now recommend year-round supplementary feeding. During breeding season (April to August), birds have high protein requirements for chick-rearing. Mealworms and suet pellets are particularly valuable at this time, as natural invertebrate availability can be unpredictable.

Winter is undeniably the most critical period, when natural food sources are scarce and energy demands for temperature regulation are highest. Keep feeders well stocked from October through to March. Frozen ground prevents thrushes and blackbirds from finding earthworms — offer apples or soft fruit in cold snaps.

Summer feeding requires extra hygiene attention: warm weather accelerates the growth of bacteria and fungi on feeders and food. Clean feeders more frequently in summer — ideally weekly. Remove uneaten food each day in warm weather and do not overfill feeders.

Hygiene and Disease Prevention

Poor hygiene at feeding stations is one of the leading causes of disease transmission between garden birds. Trichomonosis (caused by Trichomonas gallinae) has significantly impacted UK greenfinch and chaffinch populations in recent years, spreading via contaminated food and water. Salmonellosis is another disease spread at feeders and affects many species including house sparrows.

Clean all feeders, tables, and ground areas at least monthly using a mild disinfectant solution (purpose-made bird feeder cleaner or 5% bleach solution, thoroughly rinsed and dried). Clean water baths daily during summer. Move feeders and feeding areas periodically to prevent pathogen build-up on the ground below.

If you see sick or dying birds at your feeder — particularly if multiple birds show the same symptoms — stop feeding immediately and clean all equipment. Leave feeders down for two to four weeks to encourage birds to disperse before resuming. Report unusual bird deaths to the Garden Wildlife Health project run by the Zoological Society of London (ZSL). [Compare vet prices near you](/compare-vet-prices/) if you find an injured garden bird and need urgent veterinary help.

Find a Vet Near You

If you find an injured garden bird and need veterinary advice, CompareMyVet can help you locate practices in your area. Visit [app.comparemyvet.uk](https://app.comparemyvet.uk) to find a vet near you — call ahead to ask whether they treat wild birds before attending.