How the Slavs imagined the Firebird?

The Firebird - a large bird with majestic plumage that glows brightly emitting red, orange, and yellow light, like a bonfire that is just past the turbulent flame.

The feathers do not cease glowing if removed, and one feather can light a large room if not concealed. In later iconography, the form of the Firebird is usually that of a smallish fire-colored falcon, complete with a crest on its head and tail feathers with glowing "eyes". It is beautiful but dangerous, showing no sign of friendliness

The story of the Firebird inspired many literary works, including "The Little Humpback Horse" by Pyotr Yershov. The most famous production of the Firebird was by Sergei Diaghilev of Russian Ballets who commissioned composer Igor Stravinsky to create the enormously popular large-scale ballet score known as The Firebird.