There are Thrushes on migration through Sonoma right now. My vineyard property is along the Laguna de Santa Rosa, and late August through September, large flocks of migrating birds stop at the tall cottonwoods along the creek around sunset. I call it "bird happy hour". Just started up again, will have twice as many in a few weeks. I viewed them with binoculars yesterday, saw they have spotted bellies. Unfortunately, iPhone lens doesn't zoom in well. Would like to ID.