Submission deadline EXTENDED to 19 March 2023 at 11:59 p.m. ET Submission form: AOS Abstract Submission Portal Page updated 3/9/23 with deadline extension. We invite ornithologists to present their work at the 2023 joint conference of the American Ornithological Society and Society of Canadian Ornithology–Société des ornithologistes du Canada to be held in London, Ontario, …