a feral flock of colorful parakeets flies around Seward Park, a 300-acre island of green in southeast Seattle where they have taken up residence. Needless to say, they're not natives. "They're ...

Yet bird-watching hones a sharp eye for color differentiation, so Ridgway had an edge — as well as a drive for perfection enabled by 19th-century synthetic dye advancements.

While humans have three color cones in the retina sensitive to red, green and blue light, birds have a fourth color cone that can detect ultraviolet light. A Princeton-led research team trained wild ...

Parrotlet and parakeets are two adorable little birds of the parrot family are both kept as family pets. They are the two ...

This is the year of mocha mousse, according to Pantone. The company's annual color craze originates in part from the work of a 19th-century ornithologist who described the dizzying array of bird ...

"Not only does having a fourth color cone type extend the range of bird-visible colors into the UV, it potentially allows birds to perceive combination colors like ultraviolet+green and ...