Black Woodpecker Looking Out Of A Nesting Hole In A Tree Trunk

woodpecker nest black woodpecker tree trunk bark hole wood nesting trunk tree eye avian beak bird hollow woodland out ornithology dryocopus wildlife nature habitat head species environment dryocopus martius birdwatching ecology alert natural forest animal closeup close up plumage wilderness wild fauna martius beautiful look outdoor looking nobody behavior background no people black