bird birds cropper dove fly gray pigeon pigeons tortore board desk fence hole pier plain plank wood aurochs bison brown Buffalo european mammal zubr bloom blossom flower heyday inflorescence innocence white electricity energy line lines post pylon strom brick closed dwelling empty old poverty stone wall window background cover desktop Fractal fractals animal bark climb jumper nut park red squirrel tree walk armchair back chair computer cutout furniture isolated office rest sit autumn colors contrast green nature plants Poland trees yellow Bin building bunker dug-out house military pillbox Underground