The blue-eyed ground dove is one of Brazil’s hidden treasures, tucked quietly away in the country’s tropical savannas. It is one of the rarest birds on ... their bold blue eyes, which are ...

Northern cardinals, blue jays, American robins, and house sparrows are common birds throughout city life. These small, ...

While birds often have vibrant plumage, the dazzling diversity in the colour of their eyes might be just as important for their survival and reproductive success, according to a review of hundreds ...

Biofluorescent creatures generate their glow with structures that absorb high-energy wavelengths of light, such as UV, violet or blue ... that our own eyes perceive.” Though birds-of-paradise ...

Eyes open, then, for foreign feathered things large--and small. For more information about birds and bird habitat, see Sharon Sorenson's books How Birds Behave, Birds in the Yard Month by Month ...

Many types of birds — such as hummingbirds ... are invisible to human eyes. Plumage and body parts of birds-of-paradise glow in certain areas when viewed under blue and ultraviolet, or UV ...