While there is an astounding variety of physical differences in wildlife that humans can easily observe, new research from ...

Long-eared Owls have fluorescent feathers that glow under UV light. These hidden pigments vary by age, sex, and size.

A study published in The Wilson Journal of Ornithology has identified fluorescent pigments in the feathers of Long-eared Owls—visible to humans only under ultraviolet (UV) light. Led by Emily ...