If you’re a bird, or better yet several thousand birds, the best party in town is any local vineyard where the harvest is long finished but cold weather has held off and the grapes left on the wines are berry berry sweet. The air was filled with beating wings Tuesday near Mont-sur-Rolle, Chateau Chas great clouds of birds searched for the finest, juiciest grapes. When they finished the Chasselas there were Pinot Noir grapes, and some Pinot Gris and more.