Biggest Week In American Birding 2025 Dates. 2025 festival summary schedule once our schedule is finalized for 2025. Friday, may 9, 2025 time:
This annual festival, hosted by the black swamp bird observatory, takes place in a portion of northwest ohio called “the warbler capital of the world.” The biggest week in american birding is headquartered at the maumee bay lodge & conference center in maumee bay state park in oregon, oh.