​Niger (Nyjer) seeds have been a longtime favourite of goldfinches, greenfinches and siskins. They're a tiny black seed that is high energy and rich in essential oils, but they do require a specific feeder in which to offer them to minimise spillage and to protect from adverse weather conditions. Our niger feeders have a small opening within the feeder tube that allows the bird to select a seed whilst at the same time keeping the seeds in tiptop condition.