Australia bark blue branches bush colors colours coppery dark eucalypts eucalyptus evergreens foliage grass gray green grey gum-trees landscape leaves light natural natural-landscape perceptions perspectives shade shadows sky spaces sunlight sunshine surfaces textures thick thin tree trees trunk trunks twigs twisted twisting upward view wood abstract appearance backgrounds bare bumps close-up cracks edge edges grain hard-wood layers lumber patterns ridges rough shades-of-colour smooth surface texture textured timber tree-trunk uneven variations varieties wallpaper wood-grain lines nature rings branch dusk plant plants river sunset twilight fronds Israel palm automn birds bushes background England outline park silhouette Sussex winter dead knared old yellow autumn Devon moss stream valley