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

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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.

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Size: 7241px × 3823px
Photo credit: © CORDELIA MOLLOY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: biological, biology, botanical, botany, bulls, bulls-eye, caltha, cup, daylight, eye, flora, flower, flowering, flowers, guide, insect, king, light, marigold, marsh, natural, nature, nectar, palustris, pattern, petal, plant, plants, pollination, ultraviolet, uv, visible