Nest Box Mystery Solved

Two days ago I reported that something has been building a nest in my bluebird box on a post.  I suspected Tufted Titmice on the basis of the nesting material found (moss, mostly).  Today I spotted the actual builders and I wasn't far off.  That would be Carolina Chickadees.  They usually nest in smaller holes than that box would suggest, but as Richard Burton once put it in Where Eagles Dare, a hole is a hole is a hole.  So we welcome the chickadees to the nesting derby here in the Piedmont Spring.  Should be fun to watch!