Is it necessary to feed birds year-round, or just in winter?

Winter is when supplementary food matters most, since natural insect and seed supplies are scarcest and cold nights raise a bird's energy needs. Feeding through spring and summer is optional and more about observation than survival, though care should be taken with foods like whole peanuts, which can choke nestlings if brought back to a nest by parents — smaller foods or specialized feeders are recommended during breeding season.

Why do disease outbreaks sometimes get blamed on feeders?

Feeders concentrate birds from a wide area at one small point, which can accelerate the spread of diseases like trichomonosis or salmonellosis if the feeder and surrounding area aren't cleaned regularly, since sick birds contaminate the same feeding surface healthy birds then use — regular cleaning and occasionally moving a feeder's location reduces this risk substantially.

Bird Atlas

Bird Feeder

short

A bird feeder provides supplementary food, most valuably in winter, and lets birdwatchers observe species up close — but it needs regular cleaning to avoid spreading disease.

Why and when to feed birds

A bird feeder offers supplementary food to wild birds, most valuably during winter, when natural food — insects, seeds, and berries — is scarcest and cold nights sharply raise a small bird's energy requirements just to maintain body temperature overnight. Species such as the great tit and house sparrow readily use feeders and can make up a meaningful share of a local population's winter diet where feeders are consistently maintained, though wild food sources still make up the bulk of most birds' diet even in gardens with regular feeding.

Feeding through spring and summer is optional rather than necessary for survival, since natural food is abundant, and some care is needed during the breeding season: whole peanuts or large seeds can choke nestlings if adults carry them back to a nest, so smaller, softer foods or feeders designed to prevent whole-item removal are generally recommended while chicks are being fed.

Keeping feeders safe

Because a feeder concentrates birds from a wide surrounding area onto one small surface, it can also concentrate disease transmission if not maintained properly. Diseases such as trichomonosis and salmonellosis spread readily when infected birds contaminate a shared feeding surface that other, healthy birds then use — regular cleaning of the feeder itself, raking up spilled seed and droppings beneath it, and occasionally relocating the feeder a short distance all reduce this risk. A feeder showing signs of a local disease outbreak — several sick or dead birds nearby — should be taken down and thoroughly cleaned before being put back up, or left down for a period to let birds disperse.

Feeder placement close to natural cover such as shrubs gives visiting birds a quick escape from predators like sparrowhawks, which readily learn to hunt around well-stocked feeders, while still keeping the feeder visible enough for birdwatching.