In Lithuanian folk belief, a house spirit which appears in the form of a dragon. It brings its master stoles goods, such as coins, corn, and milk. An Aitvaras can be obtained from the Devil in exchange for one's soul, but can also be found, or brooded from the eggs of a seven-year-old cock. The spirit, which in the household appears as a cock, must be fed with omelet.
One legend tells of a young bride who was obliged to grind grain with a hand-mill for her mistress. The basket, however, was always full and her work was never done. Following clever advice, she discovered by the light of a sacred candle a cock vomiting the grains. She killed it, much to the distress of the mistress of the house since it was the source of her wealth.