WhenToBird

Lophodytes cucullatus · Anatidae

When Do Hooded Mergansers Arrive in Minnesota?

Adult male Hooded Merganser
Photo: Justin Flint, CC BY 4.0 via iNaturalist

Hooded Mergansers reach Minnesota in late February, are common by early March, peak in early April (20% of checklists), and most are gone by the second week of December.

When to look

First arrivalsFeb 22-28late February
Common byMar 1-7early March
PeakApr 1-7early April
Most gone byDec 8-14the second week of December

Best: early April. First arrivals late February; most are gone by the second week of December. Peak: on about 20% of Minnesota checklists.

  1. Janrare
  2. Febuncommon
  3. Marpeak season
  4. Aprpeak season
  5. Maycommon
  6. Jununcommon
  7. Juluncommon
  8. Auguncommon
  9. Seprare
  10. Octuncommon
  11. Novcommon
  12. Deccommon

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

0%10%20%30%Jan 1-7: 2.9% of 20628 checklistsJan 8-14: 3.1% of 14594 checklistsJan 15-21: 2.2% of 14238 checklistsJan 22-31: 2.3% of 20725 checklistsFeb 1-7: 2.2% of 14484 checklistsFeb 8-14: 1.3% of 15988 checklistsFeb 15-21: 1.4% of 20718 checklistsFeb 22-28: 2.9% of 15754 checklistsMar 1-7: 5.7% of 16125 checklistsMar 8-14: 12% of 19035 checklistsMar 15-21: 17% of 19586 checklistsMar 22-31: 21% of 30192 checklistsApr 1-7: 21% of 24262 checklistsApr 8-14: 19% of 30223 checklistsApr 15-21: 16% of 29085 checklistsApr 22-30: 12% of 43574 checklistsMay 1-7: 9.4% of 39300 checklistsMay 8-14: 6.7% of 45927 checklistsMay 15-21: 5.8% of 36632 checklistsMay 22-31: 5.1% of 43809 checklistsJun 1-7: 4.7% of 23418 checklistsJun 8-14: 4.5% of 20450 checklistsJun 15-21: 4.2% of 19470 checklistsJun 22-30: 3.7% of 23418 checklistsJul 1-7: 3.5% of 19104 checklistsJul 8-14: 3.6% of 16927 checklistsJul 15-21: 3.8% of 15635 checklistsJul 22-31: 3.8% of 22073 checklistsAug 1-7: 3.6% of 16255 checklistsAug 8-14: 3.5% of 16840 checklistsAug 15-21: 3.1% of 17475 checklistsAug 22-31: 2.8% of 26545 checklistsSep 1-7: 2.8% of 20750 checklistsSep 8-14: 2.4% of 18494 checklistsSep 15-21: 2.4% of 18215 checklistsSep 22-30: 2.3% of 24463 checklistsOct 1-7: 2.7% of 18252 checklistsOct 8-14: 3.0% of 19527 checklistsOct 15-21: 5.1% of 17098 checklistsOct 22-31: 7.8% of 24570 checklistsNov 1-7: 11% of 16744 checklistsNov 8-14: 14% of 13483 checklistsNov 15-21: 13% of 12525 checklistsNov 22-30: 11% of 17023 checklistsDec 1-7: 8.9% of 11645 checklistsDec 8-14: 5.3% of 11567 checklistsDec 15-21: 2.9% of 13343 checklistsDec 22-31: 2.8% of 19759 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 Minnesota 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 Minnesota

Best counties

Share of checklists at the peak
  1. Lincoln CountyBest late March · 17 checklists that week, 1,063 in all48%
  2. Big Stone CountyBest mid December · 14 checklists that week, 2,678 in all47%
  3. Yellow Medicine CountyBest late March · 66 checklists that week, 1,931 in all44%
  4. Houston CountyBest the second week of November · 143 checklists that week, 4,754 in all44%
  5. Beltrami CountyBest mid November · 115 checklists that week, 6,476 in all38%
  6. Lyon CountyBest late March · 183 checklists that week, 4,283 in all36%

Best spots

Share of checklists at the peak
  1. Central Park (west)Hennepin County, best early November · 21 checklists that week, 872 in all94%
  2. Long Meadow LakeHennepin County, best late November · 200 checklists that week, 10,107 in all92%
  3. Vadnais Snail Lake Regional ParkRamsey County, best mid November · 190 checklists that week, 4,043 in all88%
  4. Wood Lake Nature CenterHennepin County, best early November · 79 checklists that week, 7,172 in all85%
  5. Pickerel SloughGoodhue County, best mid March · 32 checklists that week, 682 in all82%

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

Best time of day

In Minnesota, the Hooded Merganser is most often listed on checklists started between 4 and 6 pm (7.8% of those checklists).

0%2%4%6%8%12 am: too few checklists (349) to judge1 am: too few checklists (331) to judge2 am: too few checklists (286) to judge3 am: too few checklists (364) to judge4 am: too few checklists (863) to judge5 am: too few checklists (7598) to judge6 am: 7.7% of 35775 checklists7 am: 6.7% of 90565 checklists8 am: 6.6% of 110612 checklists9 am: 7.1% of 106128 checklists10 am: 7.1% of 96131 checklists11 am: 7.1% of 83750 checklists12 pm: 7.0% of 76254 checklists1 pm: 7.2% of 73480 checklists2 pm: 7.7% of 73703 checklists3 pm: 7.7% of 75249 checklists4 pm: 7.9% of 68810 checklists5 pm: 7.7% of 51899 checklists6 pm: 7.0% of 38524 checklists7 pm: 5.5% of 25120 checklists8 pm: too few checklists (10568) to judge9 pm: too few checklists (2420) to judge10 pm: too few checklists (748) to judge11 pm: too few checklists (420) 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
January2.9%3.1%2.2%2.3%
February2.2%1.3%1.4%2.9%
March5.7%12%17%21%
April21%19%16%12%
May9.4%6.7%5.8%5.1%
June4.7%4.5%4.2%3.7%
July3.5%3.6%3.8%3.8%
August3.6%3.5%3.1%2.8%
September2.8%2.4%2.4%2.3%
October2.7%3.0%5.1%7.8%
November11%14%13%11%
December8.9%5.3%2.9%2.8%

Neighboring states

  • Iowa: arrives late October, 16 weeks earlier than Minnesota
  • Wisconsin: arrives mid February, 1 week earlier than Minnesota
  • South Dakota: arrives mid October, 17 weeks earlier than Minnesota
  • North Dakota: arrives the second week of March, 2 weeks later than Minnesota

Common questions

When do Hooded Mergansers arrive in Minnesota?
Hooded Mergansers reach Minnesota in late February, are common by early March, peak in early April (20% of checklists), and most are gone by the second week of December.
When do Hooded Mergansers leave Minnesota?
Most Hooded Mergansers have left Minnesota by the second week of December, when reports fall below half their usual rate. Stragglers are still reported until late January.
When is the best time to see a Hooded Merganser in Minnesota?
The Hooded Merganser is reported most often in early April, on about 20% of Minnesota checklists.
Where in Minnesota are Hooded Mergansers seen most often?
By county, Lincoln County, Big Stone County, and Yellow Medicine County have the highest peak reporting rates for the Hooded Merganser (counties with at least 200 checklists).