approaching storm cloud clouds cumulus cloud storm storm cloud sunset abundant bare branches bare tree birds black branches dark evening fauna flock ibis ibises perched perching resting silhouettes storm-clouds tree-tops approaching countryside danger England english exercise farm field Great Britain green hill imminent landscape natural nature oncoming rainstorm rural sky spring Sussex view angry approaching-storm atmosphere atmospheric blue bright cloud-formations contrast contrasting darkening disturbing dramatic dusk early-evening foreboding light lighting meteorological-phenomenon moody setting sun shining skies southern spreading stormy sun sunlight weather apocalyptic brilliant colorful colourful fiery flaming gold frightening glory gold golden molten skies shadows silhouette storm clouds bridleway destination direction footpath path track trail travel Australia