blue brown granite gray green guardrail pine road rock sky trees tunnel grass grassland larch mountain Mountainous landforms Natural landscape plant slope tree autumn fall fungus HDR log mushroom mushrooms Nyberg sponge sponges toadstool wood baby elephant bull bush elephant herd one tusk protect river stream Tusker water acorn food fruit leaf pest produce silk Terrestrial plant twig vegetable animal bird bony casque cassowary casuarius feather feathers flightless helmet horn huge isolated ostrich Arizona clouds colours desert landscape layers nature Painted Desert Petrified wood shrubs siltstone wilderness breading herd cow Hard Woods lake pine trees white countryside ferns fronds leaves montane natural norway norwegian pinnae plants pteridophytes