The Original Flat Perch Shelf. Flat Perch Shelves are made out of Non-toxic Poplar Hardwood and have all Stainless Steel fittings. Shelves are a way to have a flat spot for the birds to relax their feet and doesn’t take up much room in the cage since it attaches to the side of the cage verses a Perch that jets out in the middle of the cage. Can be combined with other Perches to make to create a fun environment for your feathery friends. You can combine the Flat Perches, Ramps, Stairs and Shelves to give your birds more surface area in the cage for exercise.It is best to vary the type of perches, use flat and round perches, they will put your birds’ feet in different configurations, which it the best for healthy feet. Flat Perches also add variety and enrichment.