Four birds gather around a saucer bird feeder in Lee Vitale's yard, including some with colorful plumage. Thank you for ...

Why do humans wear clothes? One reason is that changing outfits allows people to tailor their look in hopes of attracting or ...

The paper, by P.O. Dunn at University of Wisconsin-Milwaukee in Milwaukee, WI, and colleagues was titled, 'Natural and sexual selection act on different axes of variation in avian plumage color.' ...