Set 4x4 treated posts every 4 feet. Plant them at least two feet deep, and as tall as you want the aviary. Add treated 2x4 framing the top and bottom.

Treated 2x4 or 2x6 (depending on how long the span is) every two feet. If the span is more than 8 feet, you’ll need support posts midway.

Lay 2 foot aluminum insect screen on top of the joists. Staple it down tightly, then nail 1x2 treated wood trim on top of that. You’ll want to work one width at a time so you can reach across to staple/nail. This will be on the outside of your aviary.

If you have serious varmint problems, add a layer of hardware cloth to the outside over the insect screen. Consider digging a trench around the base, installing concrete blocks, or sheet steel to prevent predators from digging their way inside.

On the underside of the joists (on the inside), attach 1/2” mesh hardware cloth, it will contain any sized parrots and macaws cannot bite through it. This is much easier with two or three people. DO NOT USE POULTRY WIRE, it is thin and can cut toes and faces. Staple first, then attach 1x2 UNTREATED trim strips. Parrots will be able to chew on this part so double check these are untreated.

This is the same process as the walls… Hardware cloth on the inside and insect screen on the outside. Attach rolls of burlap or camo net to half of the roof to provide shade from the sun and a safe spot from potential aerial predators.

Now comes the fun part! Find branches of varying shapes and sizes, and attch them to the walls and roof joists using deck or sheet metal screws. Hang boings and swings from the ceiling joists (Using eye hooks is convenient for easy removal). Hang toys where they can be reached, install water dishes on the posts for accessibility. You may want to put these under the netting where wild bird droppings cannot fall into the water. Add a water fountain/feature and plantings of heavily shreddable safe plants, like bamboo, willow, or whatever grows well in your area.