In Swedish folklore, löfjerskor, also known as rädande, are the guardians of the trees they reside in. Trees inhabited by these spirits grow larger and faster than the surrounding plant life. They are often referred to as a variant of fae or elf.
Löfjerskor are invisible and live in the shadows of their trees. They cannot leave the shadow, nor can they take any physical form. They were most often associated with lime trees.
If a tree grew significantly healthier than its neighbors, it was thought that a löfjerskor lived in its shadow. They would violently protect their tree from any who would harm it and reward any who cared for and respected it, though its methods of doing so are vague. These trees were called habitation trees, or boträd.