Concrete nest boxes

Hi Matt, above are some photos of my woodcrete nest box that has had many many nest in.  The birds love it.  Just I couldn’t see how to fit a camera in and be able to keep the wires away from the birds.  Ironically there is very little headroom to accommodate camera and wiring above the holes, but if you were making your own I am sure it would be possible.  My son first bought himself and me one of these boxes because his first nest in a wooden box was broken into at the side by a woodpecker and lost all his chicks.  People worry about the front plate, but my son had a front plate and the woodpecker ignored this entry site and went straight through the side.  Anyway back to the boxes.  As I say I have had many a nest in mine and my son is on about his 5th or 6th year now with a nest every year!!!  
Measurements as follows:

internal :  Font to back 19cm
               Bottom to top (of apex) 22cm
               Width 13cm

External:  depth (deepest inc hole protrusion) 28cm
                Height (overall) 31cm
                 Width. 18cm

The holes were around 30mm, but I got my son to make a plate to reduce the holes to 27mm as I wanted to encourage blue tits, but that’s personal choice.  As you can see it is a weighty beast, and needs fixing to a wall or concrete post , definitely not a fence panel .

Hope this is of some use to you.  Will be VERY interested if you do build one Matt, and obviously someone has managed to get camera in so can be done.  The very best of luck.

Sue

ps sorry, didn’t see your post before (only tend to look on the bird boxes), had a message from Paul, and hence my reply to you.