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Collection place
- The Americas169 objects
- North America140 objects
- United States121 objects
- California101 objects
- Northern California91 objects
- Northwestern California70 objects
- Mendocino County, California35 objects
- South America29 objects
- Round Valley, Mendocino County, California21 objects
- North Central California20 objects
- Great Plains, North America14 objects
- Northwestern United States12 objects
- Paraguay12 objects
- Brazil10 objects
- Lake County, California10 objects
- Southwestern United States7 objects
- Big Chico Creek watershed, Butte County, California6 objects
- Butte County, California6 objects
- Chico, Butte County, California6 objects
- Pernambuco State, Brazil6 objects