Additional perch rings to for your seed feeder. These allow the birds more choice on feeding position. Try fitting some ports with perch rings and some without, and see which birds prefer which position. Some birds prefer to keep an eye out for predators and some just want to feed. Either way, perch rings give your birds the choice.
These rings are easily fitted to the Ring Pull feeders, to provide the birds with a more natural feeding position. They simply push on to the feeder perch, and are removed just as easily.