Roger Tory Peterson's unique system explains exactly what features to look for to tell one species from another. A Field Guide to Advanced Birding covers thirty-five of the most difficult groups of birds, from winter loons to confusing fall warblers, jaegers to chickadees, accipiters to flycatcher, this clearly written and beautifully illustrated field guide tells exactly how to solve the most challenging bird identification problems of North America. Soft cover, 299 pages, 4"x 7". We offer free shipping on all orders over $19.94. Orders under $19.95 will have a $2.50 handling fee added. To Order By Phone Call Toll Free: 866-596-9982