OOS Merchandise may be ordered on-line here, or send check/money order in U.S. dollars made payable to OOS to:
7845 NE 18th St.
Midwest City, OK 73141.
OOS Date Guide
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This 40-page pamphlet describes the temporal as well as geographic distribution of bird species in Oklahoma. Dividing the state into 7 geographic regions, it shows which species are expected and which are rare in each region, along with the dates during which each may be found there. Color photos on front and back covers. Seventh Edition, published in 2019.
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