I just added bird #19 to my yard list. That may not sound like very many, but we only moved into our new house in May, and we had no landscaping until August. Birds are rarely attracted to bare dirt!
Not surprisingly, #19 was a Dark-eyed Junco. Vertical migrants, Juncos spend the summer up in the mountains, nesting in the conifers, and descend to lower elevations for the winter. At 7,100 feet , our house barely qualifies as a lower elevation; the park up the road, a mere 200 feet higher, hosts juncos all year.