The RSPB recently warned gardeners that bird feeders could potentially be spreading deadly diseases such as finch trichomonosis.
While this nasty avian disease is not dangerous to humans, it infects the tissues in a bird’s mouth, throat and esophagus, making it hard for the bird to eat and breathe.
The RSPB especially noted that feeding birds on flat surfaces, like tables, may speed up the spread of diseases like these that have been linked to declining greenfinch numbers.
In fact, the charity has withdrawn flat bird feeders from sale on its website after evidence suggested they could be contributing to the spread of illnesses, particularly among finches.
In light of the announcement, wildlife expert Richard Green from Kennedy Wild Bird Food & Pet Supplies has shared important advice on how to prevent diseases running rampant in your garden.
Richard explained that keeping your bird feeder clean at all times is the best way to halt infection.
He said: “It’s important to use the right precautions to avoid health risks when cleaning your bird feeder. Wear disposable gloves and soak the feeder in a diluted bleach solution to thoroughly disinfect it and be sure to rinse it well and allow it to dry completely before refilling it with seed.”
He continued: “The amount of times you clean your bird feeder should be adjusted based on how often it’s used. For busy feeders, clean them every two to three seed refills.
“If you notice any signs of disease in the birds around your feeder, it’s important to clean and remove the feeder for at least two weeks to prevent further transmission.”
Dropped food should always be removed as it can quickly cause contamination. Richard said: “Infected birds drop food with the parasite, which is then picked up by others, spreading the disease. If you see food left on the ground, it’s a sign the area may be spreading infection.”
Bird feeders that are left damp or dirty can become breeding grounds for fungal infections like Aspergillosis and bacteria such as Salmonella.
“If you notice mouldy conditions or excessive droppings around the feeder, these are clear signs that your feeder is at risk of spreading disease,” said Richard. “Regular cleaning to remove old food, droppings, and any standing water is important to prevent this.”
Bird seed should also be replaced regularly, especially if it becomes wet.
Over crowded feeders can also become a problem. Richard added: “When birds are jostling for space, they are more likely to spread parasites like mites, lice, and ticks, which can cause further health complications.”
He advises gardeners reduce these risks by spreading food across multiple feeders to avoid overcrowding in one space.
Finally, the expert recommends that anyone struggling to keep their bird feeders clean should remove them.
He suggests: “Consider alternative ways to support wildlife, such as installing nest boxes, planting native plants, or leaving natural areas in your garden undisturbed. These options provide birds with safe spaces without the risk of disease transmission.”