Scientists have pieced together the skull of a strange ancient bird, revealing a primitive beak lined with teeth. The "transitional" bird sheds light on a pivotal point in the pathway from ...

Blue birds inhabit diverse regions worldwide ... blackish wings and tail, distinctive beak, and rufous wing bars. Male Indigo Buntings are bright blue with dark wings during breeding and browner ...

Under these drastically changing conditions, the struggle to survive favored the larger birds with deep, strong beaks for opening the hard seeds. Smaller finches with less-powerful beaks perished.