When constructing the above nestbox
(plans below) use rough-cut wood stock on both sides so birds
can grip interior and exterior surfaces.
It has a 4" by 4" floor
(inside dimensions), 8" floor to ceiling (inside front), 1 1/4" diameter
entrance hole located 6" above the floor (to top of hole) and ventilation openings in
the floor and under the roof.
Hinged roof provides easy access for
monitoring and cleaning. Shutter hooks secure roof in closed position. Pilot
holes in both primary and secondary work pieces makes for easy assembly with a screwdriver