"NR" . . "IUCN3.1" . . . "The Siberian nuthatch (Sitta arctica) is a small passerine bird of the family Sittidae, found in Eastern Siberia. Until 2006, it was usually treated as a subspecies of the Eurasian nuthatch (Sitta europaea). The split was accepted by the British Ornithologists' Union in 2012."@en . . . . . . .