The Viceroy is well-known for its mimetic resemblance to the Monarch (Danaus plexippus). The black median line across the hindwing is the quickest way to distinguish it from the Monarch. These two species can even be separated on the wing by their distinctive flight: Monarchs have a leisurely, floating flight and hold their wings at an angle above the body when gliding, while Viceroys hold their wings in a flat plane when gliding, a behaviour characteristic of the genus Limenitis.