Tawny owl (Strix aluco), adult bird looking out of a tree cavity, Frankfurt, Hesse, Germany, Europe

adult animals adult animal adult birds adult bird adult animals in the wild animals animal aves bird photography birds bird breeding burrows breeding burrow breeding season breedings breeding time breeding breed brown owl cavities cavity central europe deserted earless owls earless owl empty europe fauna frankfurt am main frankfurt on the main german federal republic germany habitat hessen hesse hessia incubate incubating looking out looking look out look matures mature middle europe natural environments natural environment natural habitat nest hole nesting holes nesting hole nesting nest nobody no one no people owls owl strigidae strigiformes strix aluco strix tawny owls tawny owl tree holes tree hole trees tree uninhabited wild animals wild animal wildlife photography wildlife wood owl