Ragtag, by Karl Wolf-Morgenlander (2010, Clarion, 226 pages)
Ragtag is a swallow who lives in Boston. He's one of the members of a group of birds called the Feathered Alliance. I won't tell you much about the Alliance, because I don't want to spoil the book. But I'll tell you a little--the Alliance is a group of non-predatory birds, led at first by the great owl Hoogol (even though he's a carnivore, he doesn't eat other birds).
The Talon Empire (raptors) is attacking Boston! The other clans of birds are trying desperately to defend themselves. Ragtag goes from an outsider to the leader of the Feathered Alliance, and using his quick wit, stubborn personality, and a few tricks (in the form of eagles!), helps his friends win the war.
I loved this book because of Ragtag's personality (he reminds of my little brother--he's very stubborn, and even annoying). It's a great book for anyone eight and up. High quality action.
I can't quite visualize what the human residents of Boston made of the whole thing--some were good, some were bad, and they all posed problems to the birds. But more to the Talon Empire....