What is "kallima"

Kallima, known as the Oakleaf or Oak Leaf butterflies, is a genus of butterflies of the subfamily Nymphalinae in the family Nymphalidae. They are found in east, south and southeast Asia. Their common name is a reference to the rear surface of their wings, which is various shades of brown. When the wings are held closed, this results in a remarkable similarity to a dead leaf, further emphasized by their wing shape.