Black Woodpecker chicks lokking out from the nest hollow in an oak tree, Texel, Netherlands realtime close-up

black woodpecker woodpecker dryocopus martius black red crown hole avian bill chick tree trunk tree nest small bird pup beak pecker open hollow habitat ornithology behavior texel netherlands wildlife closeup birdwatching child care forest trunk entrance breeding fauna young offspring baby macro birds house oak look out looking waiting hungry head cute adorable