Spotted Flycatcher update

I think I have been tricked by my pair of Flycatchers - they have conned me into thinking they were sitting on eggs when quite clear they have hatched and have done very well.  The evidence being that this morning both birds were feeding one very lonesome  large chick (still in the box) - I can only assume that other chicks have already fledged although no sign of any around the nest site. I shall probably return this evening to try to ascertain how many fledglings this pair have produced.