A new study published this week in the journal Science reveals some surprising previously unknown facts about the bird family tree--such as that falcons might actually be more closely related to parrots than to hawks. And that parrots, falcons, and songbirds are all more closely related to each other than to any other birds. Go figure! And it looks like hummingbirds and swifts evolved from nocturnal nightjars. Its going to take a while to confirm these results and to sort it all out, but there are going to be changes to how we view bird evolution, that's for sure. At any rate, you can read a summary here.