तितली नमूने की चयनात्मक इंद्रधनुषी तुलना

Scientific specimen illustration comparing the dorsal and ventral sides of a mounted male [Atrophaneura alcinous] spring form butterfly against a clean white background. A split comparison displays the left wing with vibrant iridescent structural color and selective shimmering highlights, while the right wing displays a completely non-reflective, flat [matte brown] texture without any gloss. Macro entomology photography, sharp focus on wing scales and fine venation, balanced studio lighting.