This Merlin and Arthur photo contains
sitka spruce, picea sitchensis, american white birch, paper birch, paperbark birch, canoe birch, betula cordifolia, betula papyrifera, beech, and beech tree.
There might also be
ponderosa, ponderosa pine, western yellow pine, bull pine, pinus ponderosa, birch, birch tree, common bamboo, and bambusa vulgaris.