The most interesting site is Serchio river mouth, close to Marina di Vecchiano (site no 49 of my book).
http://maps.google.it/maps?f=q&sour...3588,10.276937&spn=0.043617,0.055017&t=p&z=14
Leave the car in the parking lot and walk along the seaside to the left (South) to reach the river mouth (seabirds, terns, gulls, migrating ducks). Otherwise keep North and explore the area between the sandy dunes and the macchia for passerines (Pine Buntings already left).
Another site is Bonifica di Vecchiano but you need a local guide.
(Wallcreeper too late, you are right)