Assemble folder boxes as it described at manufacturer's instructions.
Using a measuring tape measure the length and width of the back of the box.
Cut the linen or cotton fabric by measurements of the back of the box with the addition of 2 to 1.5 cm on each side.
Place the side of the folder box on fabric and mark with a pencil the figure. Repeat on the other side also of the box. Leave the margins of 2 to 1.5 cm.
When all the sectors are ready, start sticking them on the boxes: with a brush, spread a thin layer of glue on the box and press the fabric to the box.
Spread a little glue on the inside of the folder for gluing margins.
Draw on page schematic figure of a bird. If you do not succeed alone, you can search the internet the birds silhouette and print the desired size.
With bird drawn stencil, cut five or six birds from black felt fabric .
Measure the width of all boxes together.
By width size of the boxes, cut a thin strip of felt. Then cut the bandwidth to 5 parts, by the width of the front of each box plus half inches for each side.
Using glue attache the felt strips on the front of each box. Make sure to catch them at the same height all the boxes.
It now remains just "settle" the birds on the "wire".