Looks like our new neighbors are trying to up the population.
I actually saw them mating yesterday. I'm really hoping that all the road and gas line work doesn't scare them off. This has to be one of the coolest things ever.
BTW, Kestrels eat sparrows and starlings along with snakes and bugs, though they aren't big enough to take pigeons. This is generally good. Sparrows and starlings are non-indigenous species and do a great deal of damage not only to property but to natural song bird populations. Do your part, and do NOT feed them. No bread. No corn, and no millet. Stick with black sunflower seeds. If you've got the stomach for it, trapping and disposing of European starlings and English house sparrows (but not song sparrows) is a good thing. Just do your research.