Los Angeles: Cooper Ornithological Society, 1986. Paperback. xii, 431p., profusely illustrated with b&w site and creature photos, line maps galore, stats and tables. Softbound in 10x7 inch colorphoto wraps. Cover wraps are slightly curled, find a tiny ownership name on titlepage, an else entirely unmarked copy, clean and sound. Studies in Avian Biology no. 9.