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A Field Guide to 
THE BIRDS 
by Roger Tory Peterson 
Considered the ‘Bible of ornithologists,” 
this volume emphasizes the characteris- 
tics of birds when seen at a distance. 
Peterson’s famous system is based on 
pattern drawings, field marks, and com- 
parisons between species. There are over 
1000 illustrations, 500 in color. Those 
birds, particularly waterfowl, which are 
more readily identified by pattern than 
by color are shown in black and white. 
“The most practical field guide ever written 
in any language on the birds of any region 
in the + orld.” 
GUY EMERSON 
former president, National Audubon Society 
Established 1897 
ILLINDIS AUDUBON SOCIETY 
1017 BURLINGTON AVENUE 
Downers Grove, III. 60515 
ATTEND OUR ANNUAL 
MEETING - MAY 1,2,3, 
1969 - IN EDWARDSVILLE 
LT. GOV. PAUL‘ SIMON, 
GUEST SPEAKER 


Illinois Audubon Society 
1017 Burlington Avenue 
Downers Grove, Il. 60515 

GIFT SUGGESTIONS 
Golden Nature Guides—about 160 pages, illustrated, paperback. 
Specify subjects wanted .....--++++eeereeerreees Each 
Birds Mammals 
Butterflies & Moths Non-Flowering Plants 
Flowers Pond Life 
Fossils Rocks & Minerals 
Gamebirds The Sky 
Insects Trees 
Insect Pests Weather 
Chicagoland Birds—Where & When to Find Them 
(Ellen T. Smith & William J. Beeches) aeieeuai-(els Paperback 
Flower Finder ......... nd .. May T. Watts, Morton Arboretum 
Master Tree Finder ........ May T. Watts, Morton Arboretum 
Flewering Dates of Local Plants .... Floyd Swink, Arboretum 
Distributional Checklist of Birds of Illinois 
(Harry Smith & Paul Parmalee). 0 Sic om +0 old oe ciate) 
Ducks at a Distance .........--- U.S. Dept. of Agriculture 
Food & Shelter for Birds .........--.e essere recess 
1.A.S. 
Please add 5% Sales Tax for Illinois 
and 25 cents for Handling and Servic 

Non-Profit Org. 
U. S. Postage 
PAID 
Downers Grove, | 
Permit No. 18 



UNIVERSITY OF ILLINOIS LIBRARY, 
SERIALS DEPARTMENT, 
URBANA, ILL. 61801 

