Why is bird nest fern a fungi?

The bird's nest fern is not a fungi; it is actually a type of non-flowering plant known as a fern, belonging to the family Aspleniaceae. Unlike fungi, which are classified in their own kingdom and obtain nutrients through decomposition, bird's nest ferns are vascular plants that photosynthesize to produce energy. They reproduce via spores rather than seeds, which is a characteristic trait of ferns.