Wonder Browns exhibit one of the most remarkable cases of sexual dimorphism among Australian butterflies: males feature a typical orange and brown pattern, while females display striking near-black wings bisected by a brilliant broad white diagonal band. These woodland insects inhabit shady coastal gullies and wet sclerophyll margins along the eastern seaboard, flying close to the ground beneath the dappled forest canopy. Females drop their eggs loosely among native tussock grasses, where the cryptically colored green and brown larvae feed under the cover of darkness.
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