| Ring-necked Duck(Aythya collaris) |
| - - - Spring - - - |
|---|
| Number | Date | Location | Observer | Comment |
|---|
| 28,000 | 2009-04-18 | Mille Lacs County | Jantscher | |
| 20,000 | 2024-03-04 | Wabasha County, Weaver Bottoms | Jantscher | |
| 14,000 | 2023-04-06 | Goodhue County, Lake Pepin (Goodhue Co.),44.4788094,-92.2976446 | Bardon | Estimated proportion among a raft of 24,000 ducks |
| 7,500 | 2012-03-24 | Houston County, Upper Mississippi River NWR--Reno Bottoms | Puchalski | |
| 5,600 | 2006-03-23 | Houston County | Bardon | Mississippi River backwaters |
| 4,700 | 2022-04-10 | Wabasha County, Weaver Bottoms,44.2201420,-91.9319400 | Hosch | |
| 3,700 | 2010-04-10 | Mille Lacs County | Jantscher | |
| 3,400 | 2010-04-09 | Aitkin County | Jantscher | |
| 2,400 | 2006-04-02 | Traverse County | Bardon | Mud Lake |
| 746 | 2008-04-26 | Anoka County | Brown | On HeadQuarters Rd in Carlos Avery. |
| - - - Summer - - - |
|---|
| Number | Date | Location | Observer | Comment |
|---|
| 88 | 2011-06-11 | Aitkin County, Rice Lake NWR--Viewing Platform | Sandage | Careful count with scope revealed 88 birds, many more than we usually see at thi |
| 78 | 2017-07-29 | St. Louis County, Cook WTP,47.8411814,-92.6932651 | Wallestad | Counted. |
| 75 | 2023-06-17 | Roseau County, Roseau River WMA,48.9576789,-96.0150146 | Castro-Miller | |
| 63 | 2016-06-07 | Marshall County, Agassiz NWR,48.3504,-95.9501 | Friedrichs | |
| 56 | 2015-06-11 | Aitkin County, Rice Lake NWR--Viewing Platform,46.5245268,-93.383773 | Wood | |
| 46 | 2022-06-05 | Koochiching County, International Falls Sewage Lagoons,48.5884459,-93.3709145 | Azar | |
| 45 | 2014-06-24 | Marshall County, Agassiz NWR,48.3504,-95.9501 | Lane | |
| 20 | 2006-06-08 | St. Louis County | Evers | Biwabik sewage ponds |
| - - - Fall - - - |
|---|
| Number | Date | Location | Observer | Comment |
|---|
| 930,000 | 2017-10-31 | Aitkin County, Rice Lake NWR,46.531,-93.3374 | Budde | Rice Lake NWR airboat-based waterfowl survey conducted by Duane King |
| 882,000 | 2019-10-24 | Aitkin County | Hosch | See PHS note. |
| 415,000 | 2024-11-15 | Houston County, Upper Mississippi River NWR--Reno Bottoms,43.6031680,-91.2703972 | Bardon | See comments under Canvasback |
| 261,644 | 2020-10-16 | Aitkin County, Rice Lake NWR,46.531,-93.3374 | Carlstrom | Waterfowl report supplied by the refuge manager, Walt Ford. Survey conducted by |
| 198,939 | 2011-10-11 | Aitkin County, Rice Lake NWR,46.531,-93.3374 | Budde | Rice Lake NWR airboat-based waterfowl survey conducted by Michelle McDowell |
| 194,914 | 2010-10-19 | Aitkin County, Rice Lake NWR,46.531,-93.3374 | Budde | Rice Lake NWR ground-based waterfowl survey conducted by Michelle McDowell |
| 35,000 | 2006-10-29 | Meeker County | Floren | lake ripley and east lake ripley combined |
| 25,000 | 2015-11-27 | Houston County, Pool #8 | Jantscher | |
| 15,000 | 2015-11-15 | Wabasha County, Pool #5 | Jantscher | |
| 9,500 | 2008-10-09 | Aitkin County | Jantscher | |
| 8,000 | 2018-10-24 | Wabasha County, Pool #5 | Jantscher | |
| 7,350 | 2011-11-28 | Houston County | Service | Pool 8, Upper Mississippi River N.W.F.R. Includes birds in Wisconsin. |
| 3,500 | 2011-10-14 | Aitkin County | Jantscher | |
| 3,000 | 2009-11-14 | Wabasha County | Fall | Weaver marsh; flocks estimated by scope-field sample counts |
| 999 | 2009-11-20 | Itasca County | Orf | Bowstring Lake |
| 520 | 2010-11-19 | Carver County, Carver Park Preserve--Lowry Nature Center | Cyrus | |
| - - - Winter - - - |
|---|
| Number | Date | Location | Observer | Comment |
|---|
| 22,520 | 2012-12-02 | Houston County, pool 8, UMRNWFR,43.6007232,-91.2580709 | Bardon | Carefully counted on pool 8, using numerous vantage points |
| 5,700 | 2015-12-03 | Wabasha County, Pool #5 | Jantscher | |
| 5,000 | 2015-12-03 | Houston County, Pool #8 | Jantscher | |
| 4,000 | 2009-12-05 | Houston County, Reno bottoms pool 8 | Bardon | |
| 3,800 | 2021-12-01 | Wabasha County, Pool 5 | Jantscher | |
| 3,200 | 2020-12-01 | Wabasha County, Pool 5 | Jantscher | |
| 1,100 | 2017-12-03 | Wabasha County, Pool #5 | Jantscher | |
| 350 | 2017-02-27 | Winona County | Jantscher | |
| 120 | 2017-02-27 | Cottonwood County, Wolf Lake WPA,43.8582349,-95.0879788 | Emerson | |
| 120 | 2017-02-23 | Jackson County, Sioux Valley WMA,43.523846,-95.2900028 | Emerson | |
| 100 | 2001-12-03 | Scott County, MVNWR Wilke Unit | Tustison | + |
| 75 | 2009-12-06 | Ramsey County, Vadnais Lake | Wilson | |
| |
| Breeds throughout, except far south. Migrant throughout. |
