cloud crowfoot flowers Italy landscape natural nature plant pond pool Ranunculaceae ranunculus reflection sky spring water white bare barren flower habitat hard hill hillside red rock rocky Sardinia stonecrop stony chalk coombe Devil's Dyke dry England Great Britain path South Downs Sussex track valley border english field line margin oak Quercus series trees winter agave angle big bird blue huge mountain perch sing songbird Spain spike tiny top downland footpath green hike summer Surrey trail travel Trek view walk Buckinghamshire fields meadow peace quality vegetation West Wycombe gentle rural soft Downs grass ridge wiltshire countryside fence panorama autumn beech Fagus sylvatica fall leaf leaves mellow misty