Coltsfoot in UV light. Coloured photograph of  coltsfoot (Tussilago farfara) flowers showing the pattern of absorbed (dark areas) and reflected (yell
Coltsfoot in UV light. Coloured photograph of  coltsfoot (Tussilago farfara) flowers showing the pattern of absorbed (dark areas) and reflected (yellow) ultraviolet (UV) light on the flower heads. These 'bull's-eye' patterns are known as 'nectar guides' and help to attract pollinating insects, which can see UV light. Humans are unable to see these patterns. This image was taken using a digital camera adapted to filter and detect UV light. The resulting monochrome image was coloured on a computer. UV light is outside the visible spectrum and does not have a true colour. See image B838/1219 for normal daylight version.
Size: 3879px × 2607px
Photo credit: © BJORN RORSLETT/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: absorbance, absorbing, angiosperm, angiosperms, asteraceae, biological, biology, botanical, botany, bulls-eye, coloured, colts, coltsfoot, compositae, countryside, electromagnetic, europe, european, false-coloured, farfara, flora, floral, flower, flowers, foot, guide, honey, inflorescence, mark, marks, multiple, nature, nectar, pattern, petal, petals, photography, plant, pollination, reflectance, reflecting, spectrum, tussilago, ultraviolet, uv, yellow
