Frank Walker's buffalo in Placerita Canyon, ca. 1936.
Long before Walt Disney bought a movie ranch in Placerita Canyon and ran a herd of buffalo there, Frank Walker raised American bison and a variety of other livestock on his homestead in Placerita Canyon.
Walker's son, George Starbuck III, worked at Lockheed but kept the family tradition alive, raising buffalo and goats as livestock on the old Walker homestead.
Identification by Starbuck's son, George Starbuck IV, who writes (1/30/2012): "This is one of the bison that my grandfather had roaming the ranch. This looks like the road just east of the [Placerita] Nature Center. The bison was probably from Remi Nadeau's ranch [in Sand Canyon], as he had quite a few."