911 alert black blue brown communication grass green iron fence park police street traffic trees Ahorn autumn baum Blätter fall Herbst leaves maple sky sunny tree yellow curved curves façade front glass mirror outside panes reflected reflection wall windows bottlebrush bristly brush bush callistemon flower flowering flowers fuzzy madeira natural nature red shrub berries branch clusters fruit mountain ash pinnate red summer Rowan scarlet sorbus aucuparia crop Greece Greek grove mountains old Olea olive orchard spring stone christmas cone conifer evergreen norway Picea abies plant scale seed softwood spruce ancient background bark cracked England fissure grey hard oak Quercus rough rugged texture field bristlecone contorted grain pine twisted usa wood