Song Sparrows are year round residents in Utah but I hear them most often during the winter months as they sing perched high on bushes, rushes, phragmites or cattails. These two birds were photographed at Farmington Bay Waterfowl Management Area in January a few years ago.
There are often heavy fogs in the morning at Farmington because of all the water in the area and during the coldest months that creates hoar frost that covers all the vegetation.
Song Sparrows are found throughout the U.S. and into Canada, some populations move south during the winter to southern states and northern Mexico. So far 30 subspecies of Song Sparrows have been described.