The incredible hit-parade of off-course birds from the Western US continued this week, with sightings of Western Kingbirds from High Head in Truro and Lark Sparrow and Bell’s Vireo at Fort Hill in Eastham. But instead of these actual birds, I’m more in the mood to talk about theoretical birds – the predicted influx of the so-called “winter finches." How do I know they’re coming? Because I read the Winter Finch Report, of course.