Want to help garden birds? Don’t feed them in warmer months, says RSPB
Want to help garden birds? Don’t feed them in warmer months, says RSPB
The UK’s largest bird charity, the RSPB, warns that feeding garden birds during warmer months could inadvertently harm them by creating disease hotspots. While bird feeders are often seen as a kind gesture, they may pose risks to certain species. The charity advises a break from feeding between 1 May and 31 October, a period when the spread of trichomonosis is most likely.
The Disease’s Impact
Trichomonosis, a parasitic infection, has led to sharp declines in bird populations, particularly greenfinches and chaffinches. Once common in UK gardens, greenfinches have seen a two-million drop in numbers, now listed as endangered. The parasite affects birds’ ability to eat, drink, or breathe by targeting their mouths, throats, and digestive tracts. Contaminated food sources are spread through saliva and droppings, while chicks can contract it directly from infected parents.
Feeding Practices and Household Statistics
Over 16 million households regularly provide bird food, with roughly one feeder per nine birds. The RSPB’s latest data shows greenfinches fell from a top-seven ranking in 1979 to a lower-18 position in 2025. The charity emphasizes that feeding seasonally and safely can reduce disease transmission risks. It recommends small, occasional offerings of mealworms, fat balls, or suet, while prioritizing hygiene in feeding setups.
“It’s really nice to see them from the window – they look very chipper out there,” said Helen Rowe, a London resident who feeds sparrows. Despite enjoying their presence, she plans to stop using feeders during the warmer months to protect the birds.
Experts acknowledge that natural food availability varies across regions. Dick Woods, a manufacturer of easy-to-clean feeders, pointed out, “Every garden is different. In some places, food is so abundant that birds don’t rely on feeders; in others, they have few alternatives.” The RSPB agrees, but argues that a clear, simple message is more effective than complex guidelines.
The pet food industry has criticized the shift, calling it a “significant change to long-established advice.” They warn the guidance might confuse millions of regular feeders. However, the RSPB maintains that seasonal feeding reduces the risk of disease spread, even as it admits behavioral changes will take time to implement.
Recommendations for Safe Feeding
To minimize contamination, the RSPB suggests cleaning feeders weekly and relocating them after each cleaning to prevent debris from accumulating. Fresh tap water should be provided daily, and bird baths require regular weekly maintenance. The charity also notes that flat feeders, once popular, are now discouraged due to their role in disease transmission. They have stopped selling these designs, signaling a shift away from traditional bird tables.
While the advice may challenge long-standing habits, the RSPB remains committed to simplifying the message. As Martin Fowlie explained, “We know things won’t change overnight, but keeping the guidance straightforward makes it easier for people to adopt.”