The Harmony is designed to bring balance to your yard. The wide mouth tube is easy to fill, plus the unique hinged sides allow the feeder to readily open for easy cleaning. The Harmony feeder is designed to allow you to Choose Your Birds™ by selecting which seed to serve and adjusting perch length to fit different sized birds. Seed Selection: All six feeding stations can be adjusted to accommodate mixed seed or Thistle/Nyjer and our Stay Full Ports™ ensure that seed is evenly distributed, even when the seed gets low. Adjustable Perches: The perches adjust to give the little birds a chance! Being able to adjust the length of your perch lets you control who visits your feeder. Rule of thumb: A shorter perch discourages large, and often less desirable, birds.