[click on image to see a larger one]
Sequence of quadriptychs is (left to right, top to bottom): Human vision, UV, simulated butterfly vision, simulated bee vision:
Mexican Zinnia flowers have a very specific UV pattern. Their petals are very UV dark in the middle and bottom, but their petal tips are very UV bright, reaching much deeper into UV as any other flower I know (< 345nm), and all this gets nicely visible.
Stay tuned, more will follow on that fascinating subject...