Twelfth in a series of 19 annuals published by the Cornell Laboratory of Ornithology. Recognized both for its substantive articles and original illustrations, each annual contains a wealth of information on the subject of birds. Among the topics in this issue: Passerine Birds of the Falklands, Breeding Behavior of the Snowy Owl, Adaptive Aspects of the Mountain Plover Social System. Stiff wrappers with cover painting of Hooded Mergansers by Jo Polseno and a color frontis of a Ruddy Turnstone by George Miksch Sutton. 219 pp. Very good paperback.