| Observation | Date | Location | Number of Birds | Data Source |
|---|---|---|---|---|
| Data | 1994-04-22 | Brown Road at Glenburn Road | 80 | Statewide Survey, 1994 (unpublished) |
| Data | 1988-06-04 | Sutter Bypass at Gilsizer Slough | 4000 | Breeding status, distribution, and habitat associations of the Tricolored Blackbird (Agelaius tricolor) 1859-1989. |
| Data | 1987-06-20 | Sutter Bypass at Gilsizer Slough | 10000 | Breeding status, distribution, and habitat associations of the Tricolored Blackbird (Agelaius tricolor) 1859-1989. |