Minna B. Hall (1860 – 24 July 1951) was an Americansocialite and environmentalist. Her most notable achievements include the co-founding of the Massachusetts Audubon Society and the ratification of the Weeks-McLean Act by the US Congress.[1] Together with her cousin, Harriet Lawrence Hemenway, Hall organized ladies' teas at which she urged women to stop wearing hats with feathers.[2] Hall's boycott of the fashion of wearing plumes ultimately changed the future of the American feather trade, and her activism remains a key event in the history of ornithological conservation.[2][3]