The creature zilant is depicted. Part snake, part dragon, it has wings and a curled tail, for example on the coat of arms of Kazan dating from 1730. While some of the legends associated with the zilant link it to Bulgar conceptions of "flying snakes" found in trees, others legends connect the zilant to the Altai mountains, and specific Turkic ancestors of the Tatars, the Kypchaks.
Source: wiktionary