Marsh marigold in UV light

Marsh marigold in UV light

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Caption: Marsh marigold in UV light. Marsh marigold (Caltha palustris) flowers in ultraviolet (UV) light. The bull's-eye UV pattern is a result of the flower either reflecting UV (light areas) or absorbing UV (dark areas). This pattern is known as a 'nectar guide' and is thought to attract insect pollinators that can see in UV light. This image was taken on a digital camera adapted to filter and detect UV light, resulting in a monochrome image. See image B804/4367 for the same flower seen in daylight.

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Keywords: biological, biology, botanical, botany, bull's eye, bull's-eye, bulls eye, caltha palustris, coloured, duo, electromagnetic spectrum, european, false-coloured, flora, floral, flower, flowers, honey guide, inflorescence, mark, marks, marsh marigold, nature, nectar guide, pair, petal, petals, plant, plants, pollination, ranunculaceae, spectrum, two, ultraviolet, uv, uv absorbance, uv absorbing, uv pattern, uv photography, uv reflectance, uv reflecting, yellow flower

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