birch forest in late autumn

afforestation alley arboretum autumn backgroud background beautiful beauty birch bright bush china color colorful colors copse countryside day different environment ergun fall fallen flora foliage forest garden gold golden group grove hiking hulunbuir inner khingan landscape leaf leaves light mongolia motley multicolored nature orange outdoor park peaceful perspective plant plantations plants rural rut scene scenery scenic season seasonal serene shady shrub small stem trail tree trees trunk variegated view white wood yellow