Pear flower in UV light. Pear flower (Anemone ranunculoides) photographed to show areas that reflect ultraviolet (UV) light (petals) or absorb UV light (stamens and pistils at centre of flower). The UV pattern, known as a 'nectar guide', is thought to help attract pollinating insects, which can see in UV light. This image was taken on a digital camera adapted to filter and detect UV light. The resulting image is monochrome since UV light has no true colour. See image B830/3463 for normal daylight version.