it is an alder tree with a golden bird on it. The alder tree is a famous old magical tree apotropaic against witchcraft and the Devil.
Von Franz identifies the Golden Bird seated in the apotropaic alder tree as a mandala-image within a transformation-flight sequence, functioning as a counter-demonic, nature-rooted sacred presence deeper than civilized religious symbolism.
, Shadow and Evil in Fairy Tales, 1974thesis