Feeding Birds During the Moulting Season: What They Need Most

  July 01, 2026

By late summer, many garden birds look a little scruffy. Feathers may appear uneven, patchy, or dull, and some birds seem quieter than usual. This is often because they are going through a natural process called moulting. During moulting, birds shed worn-out feathers and grow fresh new ones, preparing for the colder months ahead. It’s completely normal, but it is also one of the most energy-demanding times of the year for birds.

Growing new feathers requires protein and energy. Feathers are largely made from keratin, and producing them takes a lot of resources. At the same time, birds may be recovering from breeding season and raising chicks, which also uses up energy reserves. As a result, moulting birds can benefit from extra support, and your garden feeding station can be a real help during August and early September.

The best foods to offer during moulting season are those that provide both energy and nutrition. Sunflower hearts are an excellent choice because they are rich in oils and easy for birds to eat quickly. They are suitable for many common garden birds, including tits, finches and sparrows, and they help birds maintain their strength while they’re putting so much energy into feather growth. A good quality seed mix can also be helpful, but sunflower hearts tend to be one of the most popular and reliable foods during this period.

Protein is especially important during moulting, which is why mealworms are a great addition to summer feeding. Many birds naturally eat insects, and mealworms provide a protein-rich option that supports feather growth. Birds such as robins, blackbirds and starlings are particularly drawn to mealworms, and you may notice them visiting more often when you offer them regularly. Even birds that usually feed from hanging feeders may take mealworms if they are placed on a bird table or ground tray.

Suet products like fat balls and suet blocks can also help during moulting season, particularly if the weather turns cooler or wet. Suet provides a concentrated source of energy, which helps birds cope when they are already using so much fuel on growing new feathers. In warm weather, it’s best to place suet in a shaded spot and offer smaller amounts more frequently so it stays fresh.

During moulting, birds can be slightly more vulnerable, because missing feathers can affect their ability to fly quickly. This makes safe feeding conditions even more important. Keeping feeders clean, removing any old food, and offering fresh water can help birds stay healthy. Water is particularly valuable in late summer, as birds bathe frequently to keep their feathers in good condition and to remove loose feathers during moulting.

* Moulting may not be as widely discussed as nesting season, but it’s just as important. By feeding birds through late summer, you are helping them stay strong, grow healthy new feathers, and prepare for autumn and winter. A steady supply of sunflower hearts, occasional mealworms, and fresh water can give garden birds exactly the boost they need during this demanding time of year.