heen, Ue BP hvOeN © BU. GLE vl LN 3 
ILA.S. MEMBERSHIP DUES INCREASED 
AFTER CAREFUL CONSIDERATION, the Board of Directors of the Illinois 
Audubon Society have voted unanimously to increase the basic annual dues 
from $2.00 to $3.00, effective at once. This is the first increase in member- 
ship fees in more than 20 years, and the change was dictated by the simple 
fact that $2.00 no longer covers the actual annual cost of printing and 
mailing our Audubon Bulletin to each member. 
Since 1940, printing costs have increased over 250%; postage costs, about 
300%; and the costs of maintaining our mailing lists, addressing and stuf- 
fing envelopes, and so on, have increased proportionately. The one other 
major expense of the Society, that of providing Screen Tour Lectures every 
season (no admission charged), has increased by over 200%. The one cost 
that has not gone up is that of service on the part of your officers and 
directors: all serve free of charge. The new schedule for annual dues is as 
follows: 
ActiverM ember.) sesh eel $3.00 Contributing Member ................ $5.00 
Sustaining Member (new)...... RLU LO0 mentee CMD CT a oe $100.00 
BERET CLO Te NIEUW) Mpegs iba, OUD OU MEPL CLO (NEW, 0-311 eet hey $1000.00 
Active, Contributing, and Sustaining Memberships represent annual dues 
only; the other three categories represent permanent memberships — no 
further dues required. Persons who wish to become Benefactors may do so 
by making consecutive annual payments of $250.00 each. All dues for the 
I.A.S., of course, are income-tax deductible as charitable donations. 
The new Sustaining Membership is a class created for those members 
who wish to donate more to the Society than the regular $5.00 Contributing 
Membership. The former Sustaining Members, who paid $50.00 in past 
years, have been placed in the same category as Life Members (no addi- 
tional dues). Club Affiliation remains $5.00 per year. Since most of our 
members joined as of the first of a given year, these new rates will apply 
to everyone. 
re ft fH 
Ecology of Land Birds of the Chicago Area — Part II 
By FuLoyp A. SWINK 
Part ONE OF this series on the ecology of land birds was published in the 
September, 1959, issue of The Audubon Bulletin, and the reader is referred 
to that article for details on the methods and techniques used in conducting 
this statistical survey of the perching habits of local land birds. 
The present article concerns the Chickadee, Titmouse, Nuthatches, and 
Brown Creeper, while the first concerned the Woodpeckers. The figures be- 
low give the number of times and percentages in which each species was 
found perching in or on a given tree species or other perching site, during 
