Zonotrichia leucophrys is most known for its widespread distribution, which extends mostly from the upper parts of Alaska, down to the middle of Mexico along the west coast of North America. The white-crowned sparrow, however, also breeds all along the upper parts of Canada and winters along the width of the southern United States (Chilton et al. 1995). Their wide distribution may have to do with the various subspecies of Zonotrichia leucophrys. Some of the subspecies are year-round residents, such as Z. l. nuttalli, while others migrate short distances, and still others migrate thousands of kilometers south every year.
Biogeographic Regions: nearctic (Native )