Northern/boreal forest of the ACJV region is composed primarily of cone-bearing, needle-leaved, or scale-leaved evergreen trees, found in the northern portions of Maine, Vermont, and New Hampshire. The boreal forest is characterized predominantly by a limited number of conifer species—i.e., pine, spruce, larch, fir and to a lesser degree by some deciduous genera such as birch and poplar. Boreal plants and animals are adapted to short growing seasons of long days that vary from cool to warm. Winters are long and very cold, the days are short, and a persistent snowpack is the norm.

Birds that live here: Ruffed Grouse, Yellow-bellied Sapsucker, Wood Thrush, Veery, Black-throated Blue Warbler, American Redstart, Ovenbird, Blue-headed Vireo, and Rose-breasted Grosbeak