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California Bald Eagle Midwinter Survey
In recent years, SCPBRG has been coordinating the long-term California Midwinter Bald Eagle Survey. Participants from a variety of agencies and organizations yearly survey areas important to wintering bald eagles to assess long-term trends.
Thanks to the help of hundreds of observers, many volunteer, the 2004 California Midwinter Bald Eagle Survey was a great success. Observers throughout the state counted 586 bald eagles: 397 adults, 177 immatures, and 12 of undetermined age. Seventy-eight golden eagles were also tallied.
| 2004 Bald Eagle Midwinter Survey: | |||||||||
| Region | Routes* | Bald Eagles | Golden Eagles | ||||||
| Adult | Imm | Unk | Tot | Adult | Imm | Unk | Tot | ||
| 1 | 6 | 9 | 6 | 2 | 17 | 10 | 1 | 0 | 11 |
| 2 | 2 | 10 | 1 | 0 | 11 | 0 | 1 | 0 | 1 |
| 3 | 9 | 105 | 34 | 5 | 144 | 17 | 5 | 0 | 22 |
| 4 | 25 | 180 | 92 | 3 | 275 | 6 | 4 | 0 | 10 |
| 5 | 6 | 54 | 25 | 0 | 79 | 14 | 6 | 0 | 20 |
| 6 | 16 | 32 | 10 | 0 | 42 | 9 | 3 | 0 | 12 |
| 7 | 7 | 7 | 9 | 2 | 18 | 1 | 1 | 0 | 2 |
| Total | 71 | 397 | 177 | 12 | 586 | 57 | 21 | 0 | 78 |
2004 Regions: 1 = Central Coast Ranges; 2 = Central Valley; 3 = Great Basin; 4 = North Sierra-Cascade Ranges; 5 = North Coast Ranges; 6 = South Sierra-White Mtn Ranges; 7 = Southern Transverse Ranges.
*Number of routes within each region.
In 2005 observers throughout the state counted 496 bald eagles: 339 adults, 158 immatures, and 9 of undetermined age. Fifty-eight golden eagles were also tallied
| 2005 Bald Eagle Midwinter Survey: | |||||||||
| Region | #Obs | Bald Eagles | Golden Eagles | ||||||
| Adult | Imm | Unk | Tot | Adult | Imm | Unk | Tot | ||
| 1 | 11 | 26 | 20 | 0 | 46 | 22 | 2 | 0 | 24 |
| 2 | 16 | 118 | 29 | 3 | 150 | 3 | 0 | 0 | 3 |
| 3 | 107 | 95 | 43 | 5 | 145 | 4 | 0 | 0 | 4 |
| 4 | 25 | 43 | 26 | 1 | 70 | 9 | 5 | 0 | 14 |
| 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 6 | 29 | 55 | 37 | 0 | 85 | 14 | 2 | 1 | 13 |
| 7 | 2 | 2 | 3 | 0 | 0 | 0 | 0 | 0 | 0 |
| Total | 190 | 339 | 158 | 9 | 496 | 52 | 9 | 1 | 58 |
2005 Regions: 1 = Central Coast Ranges; 2 = Great Basin Total; 3 = North Sierra-Cascade Ranges; 4 = North Coast Ranges; 5 = Central Coast Region; 6 = South Sierra-White Mtn Ranges; 7 = Southern Transverse Ranges.
A selected portion of the survey areas are also submitted to the National Survey.
To see where some of these wintering eagles are coming from, see the Bald Eagle Migration page.