2010 Mid-winter Bald Eagle Counts
View counts from: 2015 | 2014 | 2013 | 2012 | 2011 | 2010
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%