Black Woodpecker (Dryocopus martius) at nest hole in a beech with chicks (Fagus sylvatica), Biosphaerenreservat Schwaebische Alb or Swabian Mountains Biosphere Reserve, UNESCO World Heritage Site, Baden-Wuerttemberg, Germany, Europe

alb animal animals area areas at aves baden baden wuerttemberg beech biosphaerenreservat biosphere bird birds black body breeding build building chicks complete completely day daylight daytime dryocopus during entire entirely europe exterior exteriors fagus fauna full full body germany ground grounds hatcheries hatchery heritage hole holes in kingdom length martius mountains nature nest nesting nests nobody or outdoor photo photos picidae piciformes pup pups reserve schwaebische shot shots site site sites squab squabs swabian sylvatica tetrapod the tree trees trunk trunks unesco vertebrata vertebrate vertebrates whole wholly wild wildlife with woodpecker woodpecker woodpeckers woodpeckers world world wuerttemberg young younger