This merlin on bbc fan art contains
sitka cemara, picea sitchensis, sitka spruce, douglas cemara, douglas fir, birch amerika putih, kertas birch, paperbark birch, kano birch, betula cordifolia, betula papyrifera, and amerika putih birch.
There might also be
ponderosa, ponderosa pinus, barat pinus kuning, banteng pinus, pinus ponderosa, pinus kuning barat, gunung hemlock, hemlock hitam, tsuga mertensiana, hitam hemlock, karya mertensiana, birch, and pohon birch.