The wide-mouth tube is easy to fill and eliminates spillage and the hinged sides let you open the tube for easy cleaning.
Adjustable perches let you choose the size bird you want to feed. Push them in to make them shorter which may discourage larger birds. And you can adjust the feeding ports, too. Push them up to feed any seed or mix--push them down and you can even feed tiny Nyjer seed through the slotted openings.