3D Printed Birdbox

The Western Bluebird (Sialia mexicana) is a small, colorful songbird native to open woodlands, farmlands, and grasslands of western North America. Males are striking with bright blue plumage and a rusty-orange chest, while females have more subdued grayish-blue tones.

These birds are cavity nesters, meaning they rely on natural tree holes or old woodpecker nests for breeding. Due to habitat loss, they readily use birdhouses (nest boxes) designed with a 1.5-inch entrance hole, proper ventilation, and drainage. Placing these boxes in open areas near scattered trees or fence posts helps support bluebird populations and provides them with safe nesting sites, protecting them from predators and competition from invasive species like European Starlings.

Autodesk Fusion 360

3D Printer

Filament

Set the units to inches and start a sketch on the top plane.

Make a square with dimensions 6x6 and extrude 9 inches up.

Create a sketch on the top surface of the box, and make a square with dimensions 5x5, 0.5" away from the edges, as shown in the image.

Extrude cut the inner square 8 inches down, leaving a hollow box.

Start a new sketch on one side of the box, and make a 1.5" circle with a center 7" from the bottom edge and 3" from each side edge. Extrude cut this circle -1".

You can optionally add ventilation gaps at the top of the box.

In a new design, create a sketch on the top plane. Make a rectangle with dimensions 9x7 and extrude it 1.5 inch. Create a sketch on the bottom of the box and make two squares similar to step 1 with dimensions 6x6 for the outer square and 5x5 for the inner one.

Position the edges of the outer square 0.5" from the side edges of the box, 2" from the top, and 1" from the bottom. Extrude cut the space between the squares 0.5" into the box. This will create a hole so the birdbox can slide in.