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Collection place
- California580
- North America580
- The Americas580
- United States580
- San Francisco Bay Area, California554
- Contra Costa County, California320
- Solano County, California184
- Lindsey Slough, Solano County, California180
- CA-Sol-2, Solano County, California167
- CA-CCo-138, Oakley, Contra Costa County159
- Oakley, Contra Costa County, California159
- Unincorporated western Contra Costa County, California134
- CA-CCo-151, El Sobrante, Contra Costa County131
- El Sobrante, Contra Costa County, California131
- North Central California26
- Northern California26
- CA-CCo-146, Holland Tract, Contra Costa County25
- Holland Tract, Contra Costa County, California25
- Unincorporated eastern Contra Costa County, California25
- Napa County, California21