Will my 4 month old society finch return after excaping his cage when I was cleaning it outside?

He left behind his parents and 2 syblings. I never saw him fly out I just felt a flutter near my arm and counted my birds. There was only 4 left. I surveyed my backyard for hours, but I never saw him. I have a spare cage sitting outside with food in it. Is there any chance he'll come back? Is there anything else I can do? Thanks!!