Regarding the popularly held idea that bird migration “is all about weather,” right from the first paragraph of the preface to his new book “Bird Migration; A New Understanding,” Dr. John Rappole cuts straight to the metaphorical chase with a definitive “it’s not.” What it is about is what he then proceeds to explain over the following two hundred seventy three pages in very clearly written prose well-suited to a much wider readership that just professional ornithologists and ecologists.