layer_height = 0.2
perimeters = 2
top_solid_layers = 2
bottom_solid_layers = 2
fill_density = 0.25
nozzle_diameter = 0.35
filament_diameter = 1.75
Print without support, it's all in the geometry.
It prints fully assembled in "flat packed" mode, just open and screw to tree/board.
I have included a PARTITION.stl so you can print two birdhouses off, and attach them back to back, to make a hanging condo.
A really small footprint for a large birdhouse. If you want to push the boundaries of unattended print time then I have included an stl where 3 of these are nested (sorry) together. The total build cube required for a nest of 3 is only = 176mm x 176mm x 107mm.