I haven't seen the little fledglings again since Tuesday morning. The consensus seems to be that they were orphans who somehow found their way to my porch (maybe it was the big sign that says"Bluebirds Welcome" lol), and my very possessive resident male wasn't keen on intruders. I have watched for them all day but they didn't come back to the porch. (Once I thought I heard baby bluebird begging in a normal voice, but it might have been wishful thinking, because I never saw it.) This morning my pair and two of the kids from the 3rd brood were here. Those juvies did a lot of feeding during the summer, so I'm hoping that if Ollie and Camille won't adopt the little orphans, maybe the juvies will....or better yet, maybe their parents resurfaced.