David Rothenberg: "Why Birds Sing" (Basic Books)
Birds make some of the most beautiful sounds in nature. But scientists don't really know why birds sing. Diane and author/musician David Rothenberg talk about the mystery of bird song. We'll also hear about the reappearance of the ivory-billed woodpecker.
philosopher, musician, and author of "Why Birds Sing,""Sudden Music," "Hands End," and "Always the Mountains."
editor in chief of "Living Bird," is an award-winning author and wildlife photographer.