2010 Mid-winter Bald Eagle Counts
| Location | compared | compared | % Immatures | Change in | |||||
| Adult | Sub-Adult | Immature | Unknown | Total | to 2009 | to 2008 | of known age | percentage | |
| St. Croix River | 26 | 0 | 0 | 0 | 26 | +11 | +5 | 0.0% | 0.0% |
| Wisconsin River | |||||||||
| Pettenwell to Ferry Bluff | 21 | 0 | 25 | 46 | +40 | +24 | 54.3% | 45.2% | |
| South of Ferry Bluff | 24 | 0 | 7 | 22 | 53 | +53 | +53 | 22.6% | 22.6% |
| Wisconsin River Subtotal | 45 | 0 | 32 | 22 | 99 | +93 | +77 | 41.6% | 32.5% |
| Rock River/Pecatonica | 30 | 4 | 33 | 2 | 69 | +10 | +33 | 55.2% | 30.2% |
| Illinois River | |||||||||
| Hennepin & North | 16 | 0 | 1 | 0 | 17 | -90 | -18 | 5.9% | -13.7% |
| Henry | 2 | 0 | 2 | 0 | 4 | +1 | -4 | 50.0% | 50.0% |
| South to Peoria | 28 | 3 | 9 | 9 | 49 | -1 | -8 | 30.0% | 2.9% |
| Peoria to Havana | 57 | 5 | 25 | 2 | 89 | -54 | -95 | 34.5% | 11.4% |
| Havana to Beardstown | 10 | 1 | 2 | 1 | 14 | +2 | +7 | 23.1% | 6.4% |
| South to Grafton | 8 | 1 | 2 | 1 | 12 | 0 | -2 | 27.3% | -6.0% |
| Illinois River Subtotal | 121 | 10 | 41 | 13 | 185 | -142 | -100 | 29.7% | 7.2% |
| Mississippi River | |||||||||
| Lock & Dam # 2 & 3 | 26 | 0 | 8 | 4 | 38 | +6 | +23 | 23.5% | 0.9% |
| Lock & Dam # 4 & 5 | 57 | 0 | 9 | 0 | 66 | +22 | +22 | 13.6% | -9.5% |
| Lock & Dam # 5A & 6 | 136 | 1 | 17 | 2 | 156 | +94 | +46 | 11.7% | 6.4% |
| Lock & Dam # 7 & 8 | 15 | 0 | 2 | 0 | 17 | -3 | +5 | 11.8% | -3.2% |
| Lock & Dam # 9 & 10 | 3 | 0 | 1 | 0 | 4 | -9 | -38 | 25.0% | 17.3% |
| Inland | 4 | 0 | 2 | 0 | 6 | -6 | +5 | 33.3% | 16.6% |
| Lock & Dam # 11 & 12 | 34 | 0 | 10 | 0 | 44 | -3 | -103 | 22.7% | 50.0% |
| Sav. Army Depot & Iowa | 17 | 1 | 4 | 4 | 26 | -26 | -50 | 22.7% | 10.2% |
| Lock & Dam # 13 | 8 | 1 | 1 | 1 | 11 | -201 | -163 | 20.0% | 2.5% |
| Lock & Dam # 14 | 45 | 3 | 26 | 7 | 81 | -25 | -146 | 39.2% | 8.0% |
| Lock & Dam #15 | 40 | 3 | 21 | 1 | 65 | -54 | -135 | 37.5% | 11.4% |
| Lock & Dam #16 | 36 | 0 | 3 | 0 | 39 | -148 | -161 | 7.7% | 8.9% |
| Lock & Dam # 17 | 4 | 0 | 2 | 0 | 6 | -193 | -324 | 33.3% | 19.7% |
| Lock & Dam # 18 | 142 | 19 | 29 | 3 | 193 | -437 | -1516 | 25.3% | 7.4% |
| Lock & Dam # 19 | 79 | 1 | 10 | 2 | 92 | -24 | -86 | 12.2% | 7.1% |
| Lock & Dam # 20 | 65 | 5 | 8 | 0 | 78 | -36 | +43 | 16.7% | -0.8% |
| Lock & Dam # 21 & 22 | 80 | 0 | 18 | 0 | 98 | -32 | -49 | 18.4% | -12.4% |
| Lock & Dam # 24 & 25 | 79 | 3 | 7 | 6 | 95 | -74 | +23 | 11.2% | -13.2% |
| St. Louis and South | 28 | 2 | 9 | 6 | 45 | -98 | -70 | 28.2% | -9.0% |
| Miss. River Subtotal | 898 | 39 | 187 | 36 | 1160 | -1257 | -2490 | 20.1% | -1.0% |
| Tennessee & Kentucky | 14 | 3 | 11 | 0 | 28 | +28 | -4 | 50.0% | |
| Missouri River | 1 | 1 | 0 | 0 | 2 | +2 | +2 | 50.0% | |
| 2010 Grand Totals | 1134 | 56 | 304 | 73 | 1567 | -1263 | -2485 | 24.1% | 2.9% |
| 2009 Grand Totals | 2192 | 97 | 491 | 50 | 2830 | -1267 | 21.2% | -2.4% | |
| 2008 Grand Totals | 3018 | 96 | 837 | 101 | 4052 | +228 | 23.6% | 3.9% | |
| 2007 Grand Totals | 3033 | 88 | 656 | 47 | 3824 | 2099 | 19.7% | -3.5% | |
| 2006 Grand Totals | 1299 | 42 | 350 | 34 | 1725 | 87 | 23.2% | -1.3% | |
| 2005 Grand Totals | 1181 | 61 | 324 | 72 | 1638 | -2333 | 24.6% | -3.8% | |
| 2004 Grand Totals | 2731 | 157 | 924 | 159 | 3971 | 812 | 28.4% | 1.9% | |
| 2003 Grand Totals | 2277 | 89 | 733 | 60 | 3159 | 648 | 26.5% | -5.9% | |
| 2002 Grand Totals | 1653 | 27 | 764 | 67 | 2511 | -590 | 32.4% | -2.4% | |
| 2001 Grand Totals | 2010 | 9 | 1062 | 20 | 3101 | 1533 | 34.8% | -4.1% | |