| ~ La Paz, Baja California | Mexico | 24.166667 | -110.283333 | | John2002 |
| ~ Hermosillo, Sonora | Mexico | 29.066668 | -110.966667 | | John2002 |
| north of Tucson ~, Arizona | USA | 32.16666667 | -111 | | Wett1999b |
| Audubon Research Ranch, Arizona | USA | 31.6 | -110.499 | | Kasp2003 |
| Putah Creek, California | USA | 38.5 | -122 | | Holw1998b |
| Los Angeles, California | USA | 34.001 | -118.25 | | Knig1990 |
| Spieth Reserve, Davis, Yolo, California | USA | 38.545 | -121.7394 | | Ward1987 |
| ~ Fairfield, Solano, California | USA | 38.23333333 | -122.05 | | Ward1987 |
| ~Ashland, Clark, Kansas | USA | 41.0392 | -96.3681 | | www31 |
| ~Ulysses, Grant, Kansas | USA | 41.0719 | -97.2017 | | www31 |
| ~Sublette, Haskell, Kansas | USA | 37.4817 | -100.8433 | | www31 |
| ~Meade, Meade, Kansas | USA | 37.283333 | -100.33333 | | www31 |
| ~Wilburton, Morton, Kansas | USA | 37.0736 | -101.7728 | | www31 |
| ~Liberal, Seward, Kansas | USA | 37.05 | -100.9167 | | www31 |
| ~Johnson, Stanton, Kansas | USA | 37.5706 | -101.7506 | | www31 |
| Jornada LTER, New Mexico | USA | 32.616 | -106.742 | | Kasp2003 |
| Carlsbad, 40 km E of, Los Medanos, New Mexico | USA | 32.4206 | -103.8286 | | Whit1999 |
| Interstate Highway 10 in Kimble and Kerr Counties, Texas | USA | 30.3 | -99.5 | | Cami1990 |
| ~Post, Garza, Texas | USA | 33.1908 | -101.3778 | | Pott1984 |
