Not Yet Fledged

I have been checking the "bluebird" box for the progress of our two Tufted Titmouse hatchlings.  The news?  Neither has fledged.  But every photo I have taken shows them in different positions, so I am unconvinced that they have died or have been abandoned.  One photo showed a pretty well developed bird, so this mission may end soon.  Any day now...titmouse fledglings!