http://www.rollerfeeder.com/house_english_sparrows.htm Preventing and controlling House English Sparrows and clearing the path for native songbirds is as simple as a few strands of monofilament line on the roof corners of your squirrel proof RollerFeeder. No extra products are needed such as a magic halo. See our house and english sparrow page at the below link for a few easy tips and watch a video where songbirds use the feeder with the lines attached.
