A field guide to advanced birding : birding challenges and how to approach them
Explains how to identify the most difficult species of birds
Print Book, English, 1990
Houghton Mifflin, Boston, 1990
xiv, 299 pages, 4 unnumbered leaves of plates : illustrations ; 19 cm
9780395535172, 9780395975008, 9780395533765, 9780395522820, 0395535174, 039597500X, 0395533767, 039552282X
Cover title: Advanced birding
Sponsored by the National Audubon Society, the National Wildlife Federation, and the Roger Tory Peterson Institute."