These platforms were constructed by Mike West of NNDFW, and are made of marine plywood to withstand the elements. The nesting area is 4 x 4 foot.
Drain holes were drilled in the floor to eliminate water retention. Wooden dowels were glued into other holes in the floor to help hold nesting material.
One wall faces south to provide shade during the heat of the day. The other wall faces west to block wind.