Backyard Boss

We get a lot of House Sparrows to our backyard feeder. I've only recently learned that there is a hierarchy within sparrow flocks. Above in the center is a male House Sparrow, easily recognizable by the black bib under his beak. His place in the hierarchy is reflected by the size of that black bib and since the above bird's is the biggest I saw this morning I am assuming he is the boss. However, variations in the size of the bib may also only reflect age. The other birds in the picture are female House Sparrows or juveniles.