watercolor five-horned rhinoceros beetle eupatorus gracilicornis. hand painted on white background.

animal antenna art aurata background beautiful beetle biology bright brown bug color colorful decor decoration design detail drawing drawn element engraving entomology eupatorus fauna five flap fly gracilicornis graphic hand horned illustration insect insects isolated large macro natural nature rhino rhinoceros shape single summer symbol watercolor white wild wildlife wing wings zoology