22 THE AU DW _BiO Ne (BoD Lone 
MORE BOOK REVIEWS 
THE KIRTLAND’S WARBLER, by Harold Mayfield. Cranbrook Institute of 
Science, Bloomfield Hills, Michigan. 1960. Frontispiece by Roger Tory 
Peterson. 242 pp. $6.00. 
The Kirtland’s Warbler is one of the rarest and most interesting species 
of birds occurring in the United States. It currently breeds in the Jack 
Pine Plains of but five counties located in the central portion of Michigan’s 
Lower Peninsula. The bird apparently winters in the region of the Bahama 
Islands. A 1951 census indicated that less than 1,000 individuals exist to- 
day. The Kirtland’s Warbler is apparently a species destined for extinction 
by habitat destruction. 
The text is a comprehensive coverage of the life cycle of the species. Mr. 
Mayfield’s contribution represents over 50 years of accumulated data, much 
of which was gathered by himself and the late Dr. J. Van Tyne. Chapters 
are devoted to such topics as — The Nesting Ground; Wintering Ground 
and Migration; Mating and Territorial Behavior; The Nest; Eggs; In- 
cubation; Nestling Period; Fledglings; The Cowbird. The chapter pertain- 
ing to cowbird parasitism and its effects upon the Kirtland’s Warbler is 
especially interesting and thought-provoking. The text is well-documented 
and represents a work that is scientifically sound but still of interest to the 
amateur ornithologist. 
Wiliam E. Southern, Biology Department, Northern Illinois University, DeKalb, IIl. 
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THE L.A. S. CREDO 
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The Iliinois Audubon Society is interested in and works for: 
Protection of wild birds and other wildlife; 
Conservation of all natural resources; 
Preservation of natural areas and wildlife habitat; 
An educational program designed to inform everyone in 
Illinois about the value of wildlife and wilderness areas. 
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