Aldo duck hunting from boat, Wicomico River, Maryland, November 1924 - UWDC - UW-Madison Libraries

University of Wisconsin photographic history (24 Volumes) - UWDC - UW-Madison Libraries

Aldo bird hunting with Gus, near the Shack, October 1943 - UWDC - UW-Madison Libraries

UW-La Crosse Historic Steamboat Photographs - Collection - UWDC - UW-Madison Libraries

Aldo Leopold at the shack - UWDC - UW-Madison Libraries

Duck hunter shooting ducks from hi-res stock photography and images - Alamy

Duck… Duck… Decoys in the Museum! – Lake Champlain Maritime Museum

‎Aldo Leopold with Gus at Riley - UWDC - UW-Madison Libraries

University of Wisconsin photographic history (24 Volumes) - UWDC - UW-Madison Libraries

Aldo Leopold sitting against a tree at Rio Gavilan - UWDC - UW-Madison Libraries

Rhododendron (Showboat, 1962-1963) - UWDC - UW-Madison Libraries

UW-La Crosse Historic Steamboat Photographs - Collection - UWDC - UW-Madison Libraries

aqueduct - Chesapeake & Ohio Canal National Historical Park (U.S. National Park Service)