White-crowned SparrowZonotrichia leucophrys
In most parts of the West, the smartly patterned White-crown is very common at one season or another: summering in the mountains and the north, wintering in the southwestern lowlands, present all year along the coast. Winter birds usually live in flocks, rummaging on the ground near brushy thickets, perching in the tops of bushes when a birder approaches too closely. In the East, the White-crowned Sparrow is generally an uncommon migrant or wintering bird. Different populations of White-crowns often have local "dialects" in their songs, and these have been intensively studied by scientists in some regions.