Simple camera watching the birdbox resident(s) Currently a single Bluetit sleeps in the box overnight, or comes in when the weather is bad outside.
Update, April 2020 - bluetit has moved out and is nesting with another Bluetit in a nearby box - with no camera! Camera is attached to a Zbox mini PC running Peppermint Linux and OBS Studio.
if you feel like contributing to the cost of running the camera!
Update - no birds have yet taken to living in the box, so the camera is currently watching the bird feeders during the day & switching back to the box at night..