It is usually not possible to distinguish male and female without having seen the female laying eggs or a distinctive sexual diphormism (might be a spot, stripe etc.) or some special behaviour i. e. observing male Heliconius charitonia (Zebra Longwing) (and some other Heliconius sp. and maybe other butterflies) inseminating a female pupae (do not ask me how he knows that in the pupa is a female...). Or you need the native specimen.
There is White spot on Black tip of this specie for male only in ventral view...
Following website... leftside Female and rightside Male....
http://www.flickr.com/photos/flaviocb/3153548725/
Hmmm... If you know where this plant is just check whether it is in Salanaceae family herb like Nightshade, Potato, Tomato, Brinjal, Eggplant..!!
Reference link says this butterfly lays eggs on this family plant's leafs on upper side.
Ashish, how do you know this is a male ? I saw it putting the eggs. Here is a picture of a male and a female mating, and I really could not see the difference between them.
Welcome... Rubens... I want to use local website than Wiki... for accurate specie... Referred link is like a Encyclopedia.. Hope you like that link..!!!
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