The Research Is Far More Mixed Than Critics Admit

Importantly, the scientific review RSPB relies on has not yet been fully published or peer-reviewed. The publicly shared data — based on gardens with ongoing disease outbreaks — actually show:

• Detection rates in water sources (up to 24%) and base trays (19%)
• Near-zero detection on feeder surfaces (0%)
• Very low detection in food (2%)

This suggests the risk is linked to wet, contaminated environments and congregation points — not feeding itself. The solution? Ensuring you have a rain shield or baffle above your feeder and replace food if it ever gets wet.

WBFI has provided a resource for members: WBFI’s Review of RSPB Supplementary Feeding Literature Review.

A landmark long-term study in Ibis — one of the most respected ornithological journals in the world — found that supplemental feeding significantly improved survival rates for a wide range of bird species, including species of conservation concern. Birds with feeder access entered breeding season in better condition, laid eggs earlier, and produced more surviving offspring. The article that RSPB references also highlights this point.

Researchers at the University of Exeter found that supplemental feeding increased the number of chicks produced per breeding attempt in blue tits and great tits — not decreased it, as the anti-feeder narrative implies. A 2021 review in Frontiers in Ecology and the Environment synthesized decades of feeder research and concluded that the effects of bird feeding are "largely positive when feeders are properly maintained" — a qualifier the opposition tends to drop.

The "Wrong Birds" Argument Misrepresents What Feeders Attract

Feeder design matters enormously. Tube feeders with small perches, thistle socks, and safflower seed are specifically unattractive to certain invasive species, while attracting goldfinches, chickadees, nuthatches, native sparrows, and woodpeckers.

The claim that native species rarely visit feeders simply isn't accurate. Eastern Bluebirds readily visit mealworm feeders. Many warblers visit suet feeders during migration. White-throated, fox, and song sparrows are regular feeder visitors.

Most importantly, the connection drawn between feeders and native bird decline misrepresents causality. The same window of declining woodland bird populations also saw unprecedented habitat loss, pesticide use, window collisions, and cat predation. Blaming feeders ignores those simultaneous forces.

Disease Risk Is Manageable

Feeders can concentrate birds in ways that facilitate disease transmission. But the solution is feeder hygiene, not feeder removal — unless there is an identified outbreak.

Research from the Cornell Lab of Ornithology explicitly recommends regular cleaning as the primary response to disease risk. Their guidance, developed with wildlife veterinarians, outlines cleaning protocols that reduce transmission to negligible levels.

Suggesting feeders come down during peak migration (May–October) may do more harm than good, preventing migratory birds from accessing a quick food source while expending energy. WBFI's #FeedSmart guide provides resources on how to feed properly, and UK Pet Food offers best practices as well.

Disease transmission isn't uniquely a feeder problem — birds congregate at natural food sources, water, and roosting sites too. Remove feeders, and birds will still gather, just where we can't monitor or clean.

Predator Attraction: An Argument That Cuts Both Ways

The 2.5 billion bird-deaths-by-cat figure cited by U.S. Fish & Wildlife is real and alarming — and WBFI has hosted a webinar with the American Bird Conservancy on the topic. But that figure represents all outdoor cat predation, the vast majority of which occurs independently of feeders. The solution is keeping cats indoors, not removing feeders.

As for raptors: a sharp-shinned hawk catching a house sparrow near your feeder isn't a tragedy — it's natural selection in action. Studies also show songbirds adapt their feeder visitation patterns in response to predator presence, reducing vulnerability.

Native Plants Are Great. Feeders Are Great. You Can Have Both.

The anti-feeder argument presents a false either-or choice. Plant native species. Install moving water. Leave your leaves. These are genuinely beneficial — but they are complements to feeders, not substitutes.

A homeowner who plants native shrubs and maintains a clean feeder does more for birds than one who does either alone. An apartment dweller with a window feeder can still support birds and become a more engaged conservation citizen.

Consider nursing homes: bird feeders provide significant therapeutic, emotional, and cognitive benefits to residents — reduced stress, increased joy, mental stimulation, and a sense of responsibility. Native plantings can take years to mature. A feeder provides benefits immediately to the birds and hobbyists alive right now.

The Bottom Line — Keep Feeding

A well-maintained feeder, stocked with appropriate seed, positioned thoughtfully, and cleaned regularly, provides genuine benefit to wild birds. The research supports this conclusion far more robustly than critics acknowledge. 

The 59 million Americans who fill feeders aren't naive do-gooders causing harm. They're part of one of the largest conservation communities in the world. They fund research through organizations like the Cornell Lab, populate the eBird citizen science database, and generate the political constituency that bird-protecting legislation depends on.

Clean your feeders. Choose your seed and feeders thoughtfully. Ensure you have a baffle. Change your bird bath water daily. Plant native species alongside them. Keep your cats indoors. And… keep feeding the birds!