When is a blue bird not blue? The answer to this question is always. There actually is no such thing as a blue bird. To find out why, Smithsonian asked Scott Sillett, a wildlife biologist at the ...

Nature gives us one incredible surprise after another. If you're a bird lover and have been admiring bluebirds, jays, or barn swallows, you're really seeing a brown bird. Here's how they trick you.

The human eye has three kinds of cone cells: red, green and blue. According to the National Wildlife Federation, birds have four varieties: red, green, blue and one that's specifically sensitive to ...

Life is punctuated by the chatter of birds — be it the cries of a flock of geese migrating south, a pigeon warbling just outside a cityscape window, or a crow cawing high above the treetops. But this ...

Hurricane Lee brought warblers and other colorful species rarely seen in Britain and Ireland for what will most likely be a temporary visit. By Derrick Bryson Taylor More than a dozen species of North ...