Chirp Thistle Sock wild bird food is an easy way to offer finches and other small birds high-energy thistle seeds. Thistle is naturally high in oil content, providing small songbirds with the energy they need to thrive all year. Simply hang the sock to attract finches, redpolls, siskins, and more. No setup needed - just hang in your backyard The soft, pliable mesh allows birds to cling and feed in a natural way Attracts finches, siskins, redpolls and many more