2011 Mid-winter Bald Eagle Counts
| Location | compared | compared | compared | % Immatures | change in | ||||||
| Adult | Sub-Adult | Immature | Unknown | Total | to 2010 | to 2009 | to 2008 | of known age | percentage | ||
| St. Croix River | 14 | 0 | 2 | 0 | 16 | -10 | +1 | -5 | 12.5% | 12.5% | |
| Wisconsin River | |||||||||||
| Pettenwell to Ferry Bluff | 19 | 0 | 16 | 35 | -11 | 23 | +7 | 45.7% | -8.6% | ||
| South of Ferry Bluff | 30 | 19 | 1 | 50 | -3 | +50 | +50 | 38.8% | 16.2% | ||
| Wisconsin River Subtotal | 49 | 0 | 35 | 1 | 85 | -14 | 73 | *57 | 41.7% | -0.1% | |
| Rock River/Pecatonica | 83 | 8 | 47 | 6 | 144 | 75 | +85 | +108 | 39.9% | -15.3% | |
| Illinois River | |||||||||||
| Hennepin & North | 51 | 0 | 28 | 0 | 79 | 61 | -28 | +44 | 35.4% | 29.5% | |
| Henry | 11 | 3 | 2 | 0 | 16 | 12 | +13 | +8 | 31.3% | -18.7% | |
| South to Peoria | 83 | 17 | 25 | 0 | 125 | 76 | +75 | +68 | 33.6% | -0.9% | |
| Peoria to Havana | 365 | 14 | 228 | 16 | 623 | 534 | +480 | +459 | 39.9% | 16.8% | |
| Havana to Beardstown | 2 | 0 | 1 | 0 | 3 | -11 | -9 | -4 | 33.3% | 10.2% | |
| South to Grafton | 0 | 0 | 0 | 0 | 0 | -12 | -12 | -14 | -- | -27.3% | |
| Illinois River Subtotal | 512 | 34 | 284 | 16 | 846 | 660 | 519 | -100 | 38.3% | 8.6% | |
| Mississippi River | |||||||||||
| Lock & Dam # 2 & 3 | 13 | 5 | 6 | 3 | 27 | -11 | -5 | +12 | 45.8% | 22.3% | |
| Lock & Dam # 4 & 5 | 16 | 0 | 2 | 0 | 18 | -48 | -26 | -26 | 11.1% | -2.5% | |
| Lock & Dam # 5A & 6 | 18 | 2 | 7 | 0 | 27 | -129 | -35 | -83 | 33.3% | 21.6% | |
| Lock & Dam # 7 & 8 | 3 | 0 | 0 | 0 | 3 | -14 | -67 | -9 | 0.0% | -16.8% | |
| Lock & Dam # 9 & 10 | 49 | 4 | 8 | 0 | 61 | 57 | +48 | +19 | 19.7% | -5.3% | |
| Inland | 10 | 1 | 1 | 0 | 12 | 6 | 0 | +11 | 16.7% | -16.6% | |
| Lock & Dam # 11 & 12 | 14 | 3 | 4 | 1 | 22 | -22 | -25 | -125 | 33.3% | 10.6% | |
| Sav. Army Depot & Iowa | 6 | 0 | 2 | 0 | 8 | -18 | -44 | -68 | 25.0% | 2.3% | |
| Lock & Dam # 13 | 11 | 0 | 3 | 0 | 14 | 3 | -198 | -160 | 21.4% | 1.4% | |
| Lock & Dam # 14 | 36 | 0 | 10 | 2 | 48 | -33 | -68 | -202 | 21.7% | -17.5% | |
| Lock & Dam #15 | 56 | 0 | 16 | 0 | 72 | 7 | -119 | -178 | 22.2% | -13.3% | |
| Lock & Dam #16 | 0 | 0 | 0 | 0 | 0 | -39 | -187 | -227 | -- | -7.7% | |
| Lock & Dam # 17 | 0 | 0 | 0 | 0 | 0 | -6 | -199 | -330 | -- | -33.3% | |
| Inland | 45 | 0 | 17 | 0 | 62 | 62 | 27.4% | ||||
| Lock & Dam # 18 | 84 | 0 | 20 | 0 | 104 | -89 | -524 | -1419 | 19.2% | -6.6% | |
| Lock & Dam # 19 | 57 | 0 | 18 | 0 | 75 | -17 | -41 | -103 | 24.0% | 11.8% | |
| Lock & Dam # 20 | 0 | 0 | 0 | 0 | 0 | -78 | -114 | -35 | -- | -16.7% | |
| Lock & Dam # 21 & 22 | 15 | 3 | 7 | 0 | 25 | -53 | -105 | -24 | 40.0% | 21.6% | |
| Lock & Dam # 24 & 25 | 12 | 2 | 5 | 0 | 19 | -76 | -150 | -53 | 36.8% | 25.6% | |
| St. Louis and South | 143 | 7 | 102 | 4 | 256 | 211 | +113 | +141 | 43.3% | 15.1% | |
| Miss. River Subtotal | 588 | 27 | 228 | 10 | 853 | -287 | -1746 | -2859 | 30.2% | 10.1% | |
| Tennessee | 4 | 0 | 0 | 0 | 4 | -16 | 0.0% | ||||
| Kentucky | 9 | 2 | 21 | 0 | 32 | 24 | +28 | -4 | 71.9% | ||
| Missouri River | 0 | 0 | 0 | 0 | 0 | -2 | +2 | +2 | -- | ||
| Louisiana | 58 | 1 | 3 | 62 | 6.5% | ||||||
| 2011 Grand Totals | 1317 | 72 | 620 | 33 | 2042 | 475 | -788 | -2010 | 34.4% | 10.3% | |
| 2010 Grand Totals | 1134 | 56 | 304 | 73 | 1567 | -1263 | 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% | |||