| Observation | Date | Location | Number of Birds | Data Source |
|---|---|---|---|---|
| Data | 2000-04-21 | Arena Plains Unit-Merced NWR | 0 | Statewide Survey, 2000 (unpublished) |
| Data | 2000-04-21 | Merced NWR: Dead Man Slough | 0 | Statewide Survey, 2000 (unpublished) |
| Data | 2000-04-04 | Merced NWR: East Farmfield | 3000 | Statewide Survey, 2000 (unpublished) |