1: Silverwing by Kenneth Oppel
Shade, a young Silverwing bat, has always been the runt of the litter. When he sets off on the long and dangerous winter migration to Hibernaculum, millions of wingbeats to the south, it is his chance to prove himself.He strays and is swept away from his family and friends.
He knows he must rejoin his colony so starts an epic journey - from pigeon stronghold to the rat kingdom underground. Marina, a friendly Brightwing join him on his journey, but where will their journey end?