background bark board forest fuel pine bark stack tree trunks wood branch branches green leaf leaves nature Persian silk tree tree trunk abstract form formation rock stone summer tree trunk trees child ear elephant fun juvenile mammal play run tail young cold frozen HDR ice island log Nyberg sunshine three trunk winter Balearic Islands gnarled majorca Mallorca old olive Spain appearance Australian bare brown close-up colors colours contours cracks cream edges gray grey layers lines Melaleuca mottled paper-like paperbark paperbark-tree patterns peel peeling shadows shapes shedding soft strips sunlight surface texture textured textures tree-trunk uneven variations wallpaper coconut tree coconuts exotic fruit leafs looking up palm