VOLUME 27, NUMBER L 
SEPTEMBER, i952. 
The South Australian 
NATURALIST 
A Quarterly Journal of Natural History 
published by 
THE FIELD NATURALISTS' SECTION 
of the 
ROYAL SOCIETY OF SOUTH AUSTRALIA (INC.) 
# * # 
Hon. Editor - - - NOEL LOTHIAN 
Club founded 1883 — S.A. Naturalist 1919 
The author is responsible for the facts recorded. 
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CONTENTS: 
Page 
BIRD OBSERVATIONS — Brian Glover 3 
EC OLOGY AND CO-OPERATION IN NATURE— Edgar IV. Pritchard 7 
“EARLY SPRING” — Norma Harry & 
AUSTRALIAN PLANTS— BOOK REVIEWS — Noel Lothian 9 
FLORA OF WESTERN AUSTRALIA BOOK REVIEW— Lin Williams 12 
OUR EMBLEM— “STURTS DESERT PEA” — Noel Lothian 13 
ANNUAL PROGRAMME FOR YEAR 1952-1953 15 
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PRICE 2/—, post free 
Obtainable from Hon. Magazine Secretary— 3 Martindale Avenue, 
Toorak Gardens, South Australia. 
Registered at the G.P.O., Adelaide, for transmission through the post as a periodical. 
Specialty Printers Limited, 155 Waymouth Street, Adelaide 
