30 June 2025
AOS 2025 Early-bird registration rates end.
1 July–31 July 2025
AOS 2025 Regular registration rates apply.
1 August–15 August 2025
AOS 2025 Late registration rates apply.
11–15 August 2025
The 143rd annual meeting of the American Ornithological Society (AOS) will be held in St. Louis, Missouri, USA.