WhenToBird

Aythya collaris · Anatidae

When Do Ring-necked Ducks Arrive in Wisconsin?

Adult male Ring-necked Duck
Photo: Marcel_Pepin, CC BY 4.0 via iNaturalist

Ring-necked Ducks are winter birds in Wisconsin: the first arrive in mid February, they are common by late February, peak in late March (15% of checklists), and most are gone by the second week of May.

When to look

First arrivalsFeb 15-21mid February
Common byFeb 22-28late February
PeakMar 22-31late March
Most gone byMay 8-14the second week of May

Best: late March. First arrivals mid February; most are gone by the second week of May. Peak: on about 15% of Wisconsin checklists.

  1. Janrare
  2. Febuncommon
  3. Marpeak season
  4. Aprpeak season
  5. Mayuncommon
  6. Junrare
  7. Julnot usually seen
  8. Augnot usually seen
  9. Seprare
  10. Octuncommon
  11. Novuncommon
  12. Decrare

Darker months: more checklists report it. Outlined: peak month.

0%5%10%15%20%Jan 1-7: 1.7% of 27925 checklistsJan 8-14: 1.0% of 18337 checklistsJan 15-21: 0.6% of 17370 checklistsJan 22-31: 0.6% of 23777 checklistsFeb 1-7: 0.5% of 16656 checklistsFeb 8-14: 0.7% of 18286 checklistsFeb 15-21: 0.9% of 24739 checklistsFeb 22-28: 2.4% of 20113 checklistsMar 1-7: 5.9% of 24024 checklistsMar 8-14: 11% of 26722 checklistsMar 15-21: 14% of 27238 checklistsMar 22-31: 16% of 40171 checklistsApr 1-7: 15% of 34961 checklistsApr 8-14: 14% of 39128 checklistsApr 15-21: 13% of 38887 checklistsApr 22-30: 9.4% of 57231 checklistsMay 1-7: 4.5% of 55115 checklistsMay 8-14: 1.6% of 63098 checklistsMay 15-21: 1.1% of 49821 checklistsMay 22-31: 1.3% of 56796 checklistsJun 1-7: 0.9% of 33621 checklistsJun 8-14: 0.7% of 31282 checklistsJun 15-21: 0.5% of 30186 checklistsJun 22-30: 0.5% of 35128 checklistsJul 1-7: 0.5% of 27088 checklistsJul 8-14: 0.4% of 23293 checklistsJul 15-21: 0.4% of 20933 checklistsJul 22-31: 0.3% of 27595 checklistsAug 1-7: 0.3% of 19147 checklistsAug 8-14: 0.4% of 18286 checklistsAug 15-21: 0.4% of 19195 checklistsAug 22-31: 0.4% of 28229 checklistsSep 1-7: 0.3% of 22408 checklistsSep 8-14: 0.3% of 20857 checklistsSep 15-21: 0.4% of 20707 checklistsSep 22-30: 0.7% of 26469 checklistsOct 1-7: 1.5% of 21069 checklistsOct 8-14: 2.2% of 21011 checklistsOct 15-21: 3.6% of 20006 checklistsOct 22-31: 4.2% of 26362 checklistsNov 1-7: 4.6% of 18928 checklistsNov 8-14: 4.3% of 17052 checklistsNov 15-21: 3.6% of 16291 checklistsNov 22-30: 2.7% of 20564 checklistsDec 1-7: 1.8% of 15354 checklistsDec 8-14: 1.6% of 16294 checklistsDec 15-21: 1.0% of 21430 checklistsDec 22-31: 1.2% of 26314 checklistsJanFebMarAprMayJunJulAugSepOctNovDec
Share of complete checklists reporting it, by week (4 per month). Grey bars: fewer than 10 checklists, not counted.

Frequency is the share of complete checklists in Wisconsin that listed the bird, 2016–2025. It is not a head count, and it follows where and when people go birding. How to read it.

JanFebMarAprMayJunJulAugSepOctNovDec
today
Second week of November

Each county is shaded by the share of complete checklists there that listed the bird, blended with the weeks either side. Darker is more often. It follows where people watch birds, not how many birds there are. How to read it.

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Where in Wisconsin

Best counties

Share of checklists at the peak
  1. Columbia CountyBest late March · 937 checklists that week, 15,761 in all42%
  2. Burnett CountyBest mid April · 390 checklists that week, 11,034 in all39%
  3. Monroe CountyBest early April · 91 checklists that week, 3,836 in all38%
  4. Marquette CountyBest late March · 94 checklists that week, 3,706 in all34%
  5. Lincoln CountyBest the second week of April · 316 checklists that week, 8,013 in all34%
  6. Buffalo CountyBest early April · 89 checklists that week, 3,020 in all31%

Best spots

Share of checklists at the peak
  1. Mack Wildlife Area (north)Outagamie County, best the second week of April · 26 checklists that week, 451 in all93%
  2. Sunset ParkDoor County, best late October · 43 checklists that week, 441 in all93%
  3. Whiskey Creek FlowageBurnett County, best late April · 45 checklists that week, 763 in all92%
  4. Goodwiler LakeIowa County, best late March · 26 checklists that week, 218 in all92%
  5. Lake Mills Wildlife AreaJefferson County, best early April · 68 checklists that week, 1,592 in all89%

Busy spots report more of everything; compare the checklist counts before you drive anywhere.

Best time of day

In Wisconsin, the Ring-necked Duck is most often listed on checklists started between 4 and 6 pm (5.1% of those checklists).

0%2%4%6%12 am: too few checklists (993) to judge1 am: too few checklists (844) to judge2 am: too few checklists (839) to judge3 am: too few checklists (1488) to judge4 am: too few checklists (5344) to judge5 am: 1.5% of 27016 checklists6 am: 2.4% of 83973 checklists7 am: 2.7% of 160717 checklists8 am: 3.2% of 160531 checklists9 am: 3.8% of 136968 checklists10 am: 4.3% of 119110 checklists11 am: 4.5% of 99116 checklists12 pm: 4.6% of 85078 checklists1 pm: 4.5% of 80688 checklists2 pm: 4.8% of 79140 checklists3 pm: 4.6% of 78599 checklists4 pm: 5.1% of 69767 checklists5 pm: 5.1% of 53229 checklists6 pm: 4.4% of 38769 checklists7 pm: too few checklists (24396) to judge8 pm: too few checklists (10155) to judge9 pm: too few checklists (4990) to judge10 pm: too few checklists (2463) to judge11 pm: too few checklists (1281) to judge12a3a6a9a12p3p6p9p
Share of checklists started in each local hour that reported it. It reflects when people go birding as well as when birds are active. Grey hours have too few checklists (under 2% of the state’s, or under 200) to judge.
Week-by-week table
MonthDays 1-78-1415-2122-end
January1.7%1.0%0.6%0.6%
February0.5%0.7%0.9%2.4%
March5.9%11%14%16%
April15%14%13%9.4%
May4.5%1.6%1.1%1.3%
June0.9%0.7%0.5%0.5%
July0.5%0.4%0.4%0.3%
August0.3%0.4%0.4%0.4%
September0.3%0.3%0.4%0.7%
October1.5%2.2%3.6%4.2%
November4.6%4.3%3.6%2.7%
December1.8%1.6%1.0%1.2%

Neighboring states

  • Illinois: arrives the second week of October, 17 weeks earlier than Wisconsin
  • Iowa: arrives the second week of October, 17 weeks earlier than Wisconsin
  • Michigan: arrives early October, 18 weeks earlier than Wisconsin
  • Minnesota: arrives mid February, in the same week than Wisconsin

Common questions

When do Ring-necked Ducks arrive in Wisconsin?
Ring-necked Ducks are winter birds in Wisconsin: the first arrive in mid February, they are common by late February, peak in late March (15% of checklists), and most are gone by the second week of May.
When do Ring-necked Ducks leave Wisconsin?
Most Ring-necked Ducks have left Wisconsin by the second week of May, when reports fall below half their usual rate. Stragglers are still reported until early June.
When is the best time to see a Ring-necked Duck in Wisconsin?
The Ring-necked Duck is reported most often in late March, on about 15% of Wisconsin checklists.
Where in Wisconsin are Ring-necked Ducks seen most often?
By county, Columbia County, Burnett County, and Monroe County have the highest peak reporting rates for the Ring-necked Duck (counties with at least 200 checklists).