These little guys are found pretty much everywhere, often in flocks. Males and females are indistinguishable - but we deduce this one is a female because it has a "brood patch" on its tummy. In sparrows, the females are responsible for incubating the eggs. The brood patch makes a space for the mother's body heat to warm the eggs as she sits on the nest.
Port Townsend, WA. (6/07)