United States, California, Butte, Sacramento River National Wildlife Refuge, Llano Seco Unit. U.S. Fish and Wildlife Service parcel between 7 Mile Lane and the Sacramento River. In the pasture in the S paddock of Tract 7, Sanctuary II. T20n R01E S18 NW1/4 OF SW1/4
39.583611 -121.913889 +-402m. NAD83
T20n R01E S18 NW1/4 OF SW1/4; 39§ 35m 1s N; 121§ 54m 50s W