The Female Butterfly
The Female Butterfly is one of the 24 Golden Bugs found in The Legend of Zelda: Twilight Princess. Like most female insects it is somewhat pink in color. Giving this bug to Agitha will reward Link with a Rupee prize.
The Female Butterfly is located around the east part of Hyrule Field to the east of Castle Town (Wii), or in the west part of Hyrule Field to the west of Castle Town (GameCube).
This particular insect is situated on top of a ledge, meaning Link will need to utilize either his Clawshots or his Boomerang to obtain it.
The Female Butterfly's location in Hyrule Field