Remix of historyhunters2 bluebird house. Made 5" x 5" inside and taller so critters can't reach in. Added holes for a camera. The camera used is this one:
https://www.amazon.com/dp/B0FRFKDDB8

The camera is mounted sideways because cameras have more view sideways, this allows for a better view of the front of the box where the birds enter.

Also included a version without the camera holes.
Glue the camera box to the top
The grate at bottom is cut out of a metal gutter guard.