1 July–31 July 2025
AOS 2025 Regular registration rates apply.
18 July 2025
Last day to receive discounted group rates for AOS 2025 room block at the Hyatt Regency St. Louis at the Arch.
21 July 2025
Last day to register for Audubon Center at Riverlands Field Trip & Big Muddy Paddling Trips.
1 August–15 August 2025
AOS 2025 Late registration rates apply.
11–15 August 2025
American Ornithological Society (AOS) annual meeting. This will be the 143rd annual meeting of the AOS.
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