Eurasian Nuthatch Feeding Its Chick Inside Tree Hollow In The Forest

eurasian nuthatch eurasian nuthatch bird feeding chick food tree hole hollow forest nest garden wilderness wood woodland trunk tree hollow animal wildlife nature wild beak songbird feather closeup fauna background birding ornithology european environment sitta europaea natural passerine beautiful small plumage grey wing branch avian perch birdwatching seed national geographic nat geo habitat behavior