Precise Natural History Illustration Prompt: Chinese Peacock Butterfly

An illustrative image of a male black swallowtail butterfly in spring beside a yamatsutsuji flower, emphasizing iridescent wing color gradients, yellow abdominal side stripes, and nectar guide spots on the petals.

Male spring form of the great purple emperor butterfly × Yamatsutsuji — gradient structural coloration on the wings, yellow lateral stripes on the abdomen, nectar-guide spots on the petals