Bird Watching: They built a nest, but never moved in., 1 by Brinybay

Brinybay wrote:
I bought a bird house a few months ago and put it up by our deck. About a month ago, I saw a bird exiting it, so I figured they set up house. I have not seen any activity since then, so I carefully took a peak at the inside. This bird house was designed by Wild Birds Unlimited especially for chickadees. It was built so it could be easily cleaned out after nesting season by making one side of it hinged to easily access the interior.

I took a peak inside and it appears they built a nest but never used it. The bottom layers shows the sawdust that came with it, then the rest looks like bird-built material. So did they decide not to use it, or will they be back?