On her way to visit me last week, my friend Loie Evans saw a tree sparrow in the yard here at Elk Run Assisted Living. Tree sparrows are interesting birds because they do not breed here; they breed much further north. They breed in the low shrub growth just above timberline. They are most frequently seen here in winter in the middle states.
They are not tree birds as you think of big, high trees. They are birds of the scrub land, nesting in the Hudsonian Zone all across northern Canada, where such trees as birch and alder are more shrub-like, only four to six feet high.