Could this be a partially leucistic House Sparrow?

Very cool to see the two species side-by-side like this on the same small rock!

Mating on Iris missouriensis

In artificial ground-level wildlife pond. Pond is located about 500' from several perennial seeps/very small ponds in nearby ravine.

Subespecie confinis

porch light at night

female...staying in the shade of a live oak since it was 103 F and bright sun out of the shade. All three images of same individual.

Map location somewhat approximated. Species ID tentative.

This is an example of how white-faced Cherry-faced Meadowhawks can be (and this is not even at the extreme end of whiteness they can show). Examination of the hamules is required to confirm the ID.