autumn colorful landscape of mixed forest thicket with fallen european black alder tree in kampinos nature reserve in poland

alder alnus autumn bark black botanic botany branch bush central color colorful czarna dead ecology empty europe european exterior fall fallen flora floral foliage forest glutinosa izabelin kampinos kampinoski kampnoski life mazovia mazowsze national natural nature noone olsza outdoor outside park people plant poland quercus red reserve robur travel tree trunk warm wild wildlife wood wooded yellow