At the first sight the birds are moving quite chaotically. When you look closer, they rather move the same direction (in circles), formating some uneven lines. My intention was to create 3D visualization and formate birds in more 'tamed' lines.
...then I created the "stage" (from now on called BLACK BOX)...
...and finally few "bird lines' using paper and black marker to blackout the gaps between individual birds.
And here is the result - few options of "tamed birds" installed in the black box: