Aitvaras is a household spirit in Lithuanian mythology

Lithuanian mythology

Lithuanian mythology is an example of Baltic mythology, developed by Lithuanians throughout the centuries.-History of scholarship:Surviving information about Baltic paganism in general is very sketchy and incomplete. As with most ancient Indo-European cultures Lithuanian mythology is an example of...

. Other names are Kaukas, Pūkis, Damavykas, Sparyžius, Koklikas, Gausinėlis, Žaltvikšas, and Spirukas. Aitvaras is identical to the Latvian Pūkis. An Aitvaras looks like a white or black rooster with a fiery tail (meteorite

Meteorite

A meteorite is a natural object originating in outer space that survives impact with the Earth's surface. Meteorites can be big or small. Most meteorites derive from small astronomical objects called meteoroids, but they are also sometimes produced by impacts of asteroids...

). An Aitvaras may hatch from an egg of a 9–12 year old rooster. If the Aitvaras dies, he becomes a spark.

In many cases, this Lithuanian creature is described as having the appearance of a rooster

Rooster

A rooster, also known as a cockerel, cock or chanticleer, is a male chicken with the female being called a hen. Immature male chickens of less than a year's age are called cockerels...

 while indoors and the appearance of a dragon

Dragon

A dragon is a legendary creature, typically with serpentine or reptilian traits, that feature in the myths of many cultures. There are two distinct cultural traditions of dragons: the European dragon, derived from European folk traditions and ultimately related to Greek and Middle Eastern...

outdoors. An Aitvaras will lodge itself in a house and will most often refuse to leave. It brings both good and bad luck to the inhabitants of the house. Aitvaras provide their adopted home with stolen gold and grain, often getting the household into trouble. According to many, an Aitvaras can be purchased from the devil - the price being that person's soul.