Long-eared owls reveal secret glow under UV light
Scientists from American universities have discovered that the feathers of the long-eared owl glow in the dark! However, to observe this phenomenon, you must use ultraviolet light.
The long-eared owl, also known as the common-eared owl, is one of the most commonly encountered owl species. It is relatively easy to identify. According to the G.pl service, it is distinguished by its orange eyes and protruding "ear tufts". Its plumage is generally rusty-brown, although some individuals have grey colouring. This owl is found not only in Europe but also in Asia, Africa, and North America.
Although it may seem that researchers know a lot about long-eared owls, it turns out that they still hold some mysteries. Recent research by scientists from Drexel University and Northern Michigan University revealed that long-eared owls' feathers contain fluorescent pigments! This extraordinary feature is visible to the human eye under ultraviolet light.
The pigments glow under ultraviolet light, and this was discovered during bird banding in 2020. The fascinating research findings were published in "The Wilson Journal of Ornithology."
An American scientific team led by Dr Emily Griffith scanned the birds' plumage with a special device that showed clear bioluminescence. It was particularly visible from the underside of the wings.
It was also found that female long-eared owls have a higher concentration of the glowing pigment. "This feature is not strictly dependent on gender. The amount of pigment is associated with size, age, and gender," explained Dr Emily Griffith.
Why do they glow in the dark?
Scientists suggest that the glowing pigments in long-eared owls' feathers may reflect infrared radiation, providing better heat insulation.
Research on bioluminescence in birds is still in its early stages, but it already offers fascinating insights into these animals' adaptation to their environment.
