With these handy paperback reference guides, illustrated throughout with black-and-white line drawings, nature watchers know what to look for and how to interpret what they see. Whether carried into the field or consulted at home, these books provide readers with fascinating facts and insights into the behavior of birds and wildlife. With more than 3 million copies of their books sold to date, Donald and Lillian Stokes are increasingly recognized and celebrated as America's preeminent authorities on nature and birding.