Leshy
Lesovik
This is a Slavic forest spirit which are found in all types of forest, but are mostly common in spruce forests.
A leshy is a shapeshifter and can turn himself into a stumb, a bird, a beast, a blackcock, a bear, a plant. This is because besides being a forest spirit he is the essence of the forest itself.
He is dressed in contrast to how people dress - the right shoe on the left foot and vice versa, for example. He is dressed in a kaftan and a red girdle. His eyes are green with a constant glow, he has no eyebrows nor eyelashes and is crop-eared. Some say he is overgrown with moss.
He has blue blood and if you look at him through the right horse's ear, the leshy's blood makes him shimmer in a bluish color.