Roger Tory Peterson (1908-1996), Parrots (Escapes)
Roger Tory Peterson (1908-1996), Pheasants, Gamebirds
Roger Tory Peterson (1908-1996), Swans, Geese
Roger Tory Peterson (1908-1996), Turkey, Pheasant, Grouse
Roger Tory Peterson (1908-1996), Woodpeckers, Flickers, Sapsuckers
Roger Tory Peterson (American, 1908-1996), Andean Condors
Roger Tory Peterson (American, 1908-1996), Chicken - Like Birds...
Roger Tory Peterson (American, 1908-1996), Golden Pheasant
Roger Tory Peterson (American, 1908-1996), Hawks
Roger Tory Peterson (American, 1908-1996), King Vultures and American Black Vulture
Roger Tory Peterson (American, 1908-1996), Pheasant and Quail
Roger Tory Peterson (American, 1908-1996), Tropical Birds...
Rudolf Cronau (1855-1939) Am Fusse der Sycamore-Strasse in Milwaukee. Wisconsin. 5
Rudolf Cronau (1855-1939) Auf dem Greenwood-Cemetery in Brooklyn. Long Island. New York. 14
Rudolf Cronau (1855-1939) Blockhaus im Urwalde. Oregon. 18
Rudolf Cronau (1855-1939) Das Washington - Monument in Baltimore. Maryland. 19
Rudolf Cronau (1855-1939) Der Castle-Geysir im Yellowstone-Park. Wyoming. 17. [Castle Geyser Yellowstone Park, Wyoming]
Rudolf Cronau (1855-1939) Der Falle des Niagra. 10. [Niagara Falls]
Rudolf Cronau (1855-1939) Der grosse Pfeifensteinbruch, das Heiligthum der rothen Rasse. Minnesota. 13, [Pipestone Quarry Minnesota]
Rudolf Cronau (1855-1939) Die, Mammoth Hot Springs” im Yellowstone-Park. Wyoming. 3. [Hot Springs Yellowstone Park, Wyoming]