Stumped by seemingly indistinguishable immature gulls covering the beach? Wonder whether the accipiter raiding your feeder is a female sharp-shinned hawk or a male Cooper"s hawk? Well-known birder and author Kenn Kaufman presents some of North America"s most challenging bird-identification conundrums in this guide for the advanced birder. Each chapter covers a group of difficult-to-identify or similar-looking birds, with analyses, tips, and drawings to aid in positive identification. Improve your birding skills and add more species to your life list with this excellent resource.