Eurasian Nuthatch or Wood Nuthatch on a Tree Trunk With Food in Beak in Korean Summer Forest

eurasian nuthatch wood nuthatch sitta europaea tree trunk beak summer forest south korea bird ornithology closeup habit behavior hold nut bill bark forest summer blue plumage stripe head down forage looking wild animal nuthatch wildlife feather trunk nature foraging bokeh tranquility woodland one animal eurasian perched