Editing World tree (section)

=====''Bai-Terek''=====
The ''Bai-Terek'' (also known as ''bayterek'', ''beyterek'', ''beğterek'', ''begterek'', ''begtereg''),<ref name=Dochu2017>{{cite journal|last1=Dochu|first1=Alina|title=Turkic etymological background of the English bird name terek ' Tringa cinereus '|journal=Acta Orientalia Academiae Scientiarum Hungaricae|date=December 2017|volume=70|issue=4|pages=479–483|doi=10.1556/062.2017.70.4.6|s2cid=134741505|url=http://real.mtak.hu/71283/1/062.2017.70.4.6.pdf}}</ref> found, for instance, in the Altai ''Maadai Kara'' epos, can be translated as "Golden [[Populus|Poplar]]".<ref name="himalayanresearch.org">Zhernosenko, I. A.; Rogozina, I. V. "[http://www.himalayanresearch.org/pdf/Vol18%20Nos3-4.pdf WORLDVIEW AND MENTALITY OF ALTAI'S INDIGENOUS INHABITANTS]". In: ''Himalayan and Central Asian Studies''; New Delhi Vol. 18, Ed. 3/4 (Jul–Dec 2014): 111.</ref> Like the mythological description, each part of tree (top, trunk and root) corresponds to the three layers of reality: heavenly, earthly and underground. In one description, it is considered the ''axis mundi''. It holds at the top "a nest of a double-headed eagle that watches over the different parts of the world" and, in the form of a snake, [[Erlik]], deity of the underworld, tries to slither up the tree to steal an egg from the nest.<ref name=Dochu2017/> In another, the tree holds two gold cuckoos at the topmost branches and two golden eagles just below. At the roots there are two dogs that guard the passage between the underworld and the world of the living.<ref name="himalayanresearch.org"/>