Bolla (also known as Bullar in South Albania), is a type of serpentic dragon (or a demonic dragon-like creature) with a long, coiled, serpentine body, four legs and small wings in ancient Albanian folklore. This dragon sleeps throughout the whole year, only to wake on Saint George's Day, where its faceted silver eyes peer into the world. The Bolla does this until it sees a human. It devours the person, then closes its eyes and sleeps again.
In its twelfth year, the bolla evolves by growing nine tongues, horns, spines and larger wings. At this time it will learn how to use its formerly hidden fire-breathing abilities, and is now called a Kuçedra (hydra). The Kuçedra causes droughts and lives off human sacrifices. The Kuçedra is sometimes also represented as an enormous woman with a hairy body and hanging breasts. In other mythologies it corresponds to the Lernaean Hydra of the Greek Mythology.
The monster can cause a shortage of water and it requires human sacrifices to propitiate it. The creature is also known as Bullar in southern Albania.