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