American Kestrel nest box

Step 20 Finishing touches

Almost there! Still with the larger drill bit, put a half dozen or so drain holes into the boxes' bottom piece. Then along the upper part of the side, put a few ventilation holes. Finally, add holes in the backing piece to accommodate your planned hanging hardware. I actually ended up using a fairly large drill bit (1/2") to put pairs of holes above and below the box large enough to handle the extra-large zipties we use for mounting.