Songbird Essentials WF91008 Nesting Material Wreath Nesting material wreath For door, or hang it on a post, tree, clothesline anywhere the birds may find this nest building helper The nesting material available that contains a mixture of five natural colored materials preferred by north american nesting birds Feathers, string, cotton, hemp, and aspen fiber all included Nesting material attracts many more birds than cotton only mixtures