I had occasion to measure this book's effectiveness on a two-week visit to Grand Manan, New Brunswick, in September -- not, strictly speaking, New England, but close enough. That trip focused on the birds of that wonderful island, but our group was interested in everything that flew, swam, waddled, or grew. I was greatly impressed by how many organisms this book let me pin down with confidence. I've added the Kaufman Guide to Nature of New England to the fiercely selective list of references I recommend that participants pack on my tours, and will have it in my pocket myself on my next trip to New England.