The Connecticut Audubon Society was founded by 1898 and received its first land donation in 1914 from Annie Burr Jennings. From there, the Birdcraft Museum and Sanctuary grew into the one of the foremost conservation organizations in the state of Connecticut. While not a comprehensive collection of the organization's records, this group of select inactive office files document key eras of the group's history. Of particular note are the late 1910s observation books of birds and the environment at the Birdcraft Museum and Sanctuary in Fairfield, Connecticut, along with early membership rolls, office files, and scrapbooks focused on outreach and events.