The fonds consists of Calgary Naturalists' Club minutes, correspondence, membership lists (1949-1956) and photographs of natural science display; and Calgary Bird Club / Calgary Field Naturalists' Society constitution (1955-1963), minutes (1955-2013), correspondence (1956-1978), attendance and membership lists (1965-1975, 1995-2010), reports, bird species checklists, newsletters (1978-2013), newspaper clippings and pamphlets, posters and miscellany.