Join COS

Membership dues for COS are payable January 1 for the calendar year. Members receive the COS newsletter The Chicago Birder and may participate in all COS activities. To join COS, simply complete this form and submit it or print this page and mail it with a check for membership (payable to "Chicago Ornithological Society") to:

Chicago Ornithological Society
10th Floor - #C980
28 East Jackson Building
Chicago, IL 60604


Mandatory fields are marked with a *


(773-232-2323)

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