...between £12 - £18 for a 12.5kg bag
Sunflower seeds are available in three varieties for feeding birds: striped/black, black and sunflower hearts.
Both striped-black and straightforward black sunflower seeds are high in nutritional content, but black-only sunflower seeds contains a higher percentage of energy content. In fact, it is this type of sunflower seed that is used for producing oil. They are eaten by many birds, buy mainly tits, woodpeckers, nuthatches and finches.
Some birds don’t take well to ‘husked’ sunflower seeds, and therefore it’s possible to buy sunflower hearts (or ‘kernels’) instead: kernels contain approximately 50% fat, 23% protein, 3% sugars and 19% carbohydrate. Robins in particular like to eat the sunflower hearts.