CORDELIA MOLLOY / SCIENCE PHOTO LIBRARY CORDELIA MOLLOY / SCIENCE PHOTO LIBRARY
Marsh marigold (Caltha palustris) in UV (ultraviolet) light (left) and in daylight (right). The pattern seen in the left-hand image, known as the bull's-eye or nectar guide, is thought to help attract pollinating insects, which can see in UV light.
Model release not required. Property release not required.