I wonder why these delicate darlings, I mean butterflies, are given names of other animals! May be there is a reason.
Plain tiger (Danaus chrysippus) is a colourful butterfly that shows sexual dimorphism; the males have a white pouch on the underside of the hind wings. It is a cluster of specialized scent scales used to attract females. This difference can be clearly seen in the images here.
Also known as African monarch, these butterfly are widespread in Asia and Africa. The plain tiger is believed to be one of the first butterflies to be used in art.