Keep your birds singing with Morning Song Goldfinch Thistle Seed. A high-oil content seed for your goldfinches. Attracts goldfinches, purple finches, house finches, buntings, siskins and redpolls. These tiny Nyjer (thistle) seeds provide a high-energy, high-oil treat. For use in a thistle sock or finch tube feeder. Mills family owned and food safety certified since 2014.