WhenToBird

Melospiza georgiana · Passerellidae

When Do Swamp Sparrows Arrive in Minnesota?

Adult Swamp Sparrow
Photo: Sandra Keller, CC BY 4.0 via iNaturalist

Swamp Sparrows reach Minnesota in early April, are common by mid April, peak in early May (14% of checklists), and most are gone by mid October.

When to look

First arrivalsApr 1-7early April
Common byApr 15-21mid April
PeakMay 1-7early May
Most gone byOct 15-21mid October

Best: early May. First arrivals early April; most are gone by mid October. Peak: on about 14% of Minnesota checklists.

  1. Jannot usually seen
  2. Febnot usually seen
  3. Marrare
  4. Aprpeak season
  5. Maypeak season
  6. Junpeak season
  7. Julpeak season
  8. Augcommon
  9. Seppeak season
  10. Octpeak season
  11. Novuncommon
  12. Decnot usually seen

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

0%5%10%15%20%Jan 1-7: 0.2% of 20628 checklistsJan 8-14: 0.3% of 14594 checklistsJan 15-21: 0.2% of 14238 checklistsJan 22-31: 0.2% of 20725 checklistsFeb 1-7: 0.1% of 14484 checklistsFeb 8-14: 0.1% of 15988 checklistsFeb 15-21: 0.1% of 20718 checklistsFeb 22-28: 0.1% of 15754 checklistsMar 1-7: 0.1% of 16125 checklistsMar 8-14: 0.1% of 19035 checklistsMar 15-21: 0.3% of 19586 checklistsMar 22-31: 0.5% of 30192 checklistsApr 1-7: 1.0% of 24262 checklistsApr 8-14: 3.2% of 30223 checklistsApr 15-21: 5.7% of 29085 checklistsApr 22-30: 13% of 43574 checklistsMay 1-7: 16% of 39300 checklistsMay 8-14: 13% of 45927 checklistsMay 15-21: 11% of 36632 checklistsMay 22-31: 10% of 43809 checklistsJun 1-7: 9.9% of 23418 checklistsJun 8-14: 11% of 20450 checklistsJun 15-21: 12% of 19470 checklistsJun 22-30: 12% of 23418 checklistsJul 1-7: 13% of 19104 checklistsJul 8-14: 13% of 16927 checklistsJul 15-21: 13% of 15635 checklistsJul 22-31: 12% of 22073 checklistsAug 1-7: 8.5% of 16255 checklistsAug 8-14: 5.6% of 16840 checklistsAug 15-21: 4.0% of 17475 checklistsAug 22-31: 3.9% of 26545 checklistsSep 1-7: 4.8% of 20750 checklistsSep 8-14: 6.0% of 18494 checklistsSep 15-21: 7.6% of 18215 checklistsSep 22-30: 13% of 24463 checklistsOct 1-7: 15% of 18252 checklistsOct 8-14: 13% of 19527 checklistsOct 15-21: 8.2% of 17098 checklistsOct 22-31: 4.1% of 24570 checklistsNov 1-7: 1.6% of 16744 checklistsNov 8-14: 0.7% of 13483 checklistsNov 15-21: 0.4% of 12525 checklistsNov 22-30: 0.2% of 17023 checklistsDec 1-7: 0.3% of 11645 checklistsDec 8-14: 0.3% of 11567 checklistsDec 15-21: 0.3% of 13343 checklistsDec 22-31: 0.2% 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. Wilkin CountyBest the second week of July · 15 checklists that week, 1,101 in all50%
  2. Mahnomen CountyBest early July · 12 checklists that week, 618 in all39%
  3. Waseca CountyBest mid June · 49 checklists that week, 1,630 in all37%
  4. Lac qui Parle CountyBest mid June · 53 checklists that week, 3,681 in all35%
  5. Aitkin CountyBest early July · 188 checklists that week, 4,943 in all34%
  6. McLeod CountyBest the second week of July · 46 checklists that week, 3,198 in all34%

Best spots

Share of checklists at the peak
  1. Paul Hugo Farms State Wildlife Management AreaWashington County, best the second week of July · 24 checklists that week, 386 in all89%
  2. Western Waterfront TrailSt. Louis County, best late June · 51 checklists that week, 1,973 in all86%
  3. French LakeHennepin County, best mid July · 22 checklists that week, 724 in all78%
  4. Carlos Avery State Wildlife Management AreaAnoka County, best early July · 21 checklists that week, 406 in all77%
  5. Oakdale Nature Preserve ParkWashington County, best early July · 32 checklists that week, 2,380 in all77%
  6. Horseleg LakeIsanti County, best the second week of May · 23 checklists that week, 250 in all75%

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

Best time of day

In Minnesota, the Swamp Sparrow is most often listed on checklists started between 6 and 8 am (12% of those checklists).

0%5%10%15%20%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: 15% of 35775 checklists7 am: 11% of 90565 checklists8 am: 8.6% of 110612 checklists9 am: 7.2% of 106128 checklists10 am: 5.8% of 96131 checklists11 am: 4.8% of 83750 checklists12 pm: 4.1% of 76254 checklists1 pm: 3.8% of 73480 checklists2 pm: 3.9% of 73703 checklists3 pm: 4.0% of 75249 checklists4 pm: 4.6% of 68810 checklists5 pm: 5.7% of 51899 checklists6 pm: 6.4% of 38524 checklists7 pm: 7.2% 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
January0.2%0.3%0.2%0.2%
February0.1%0.1%0.1%0.1%
March0.1%0.1%0.3%0.5%
April1.0%3.2%5.7%13%
May16%13%11%10%
June9.9%11%12%12%
July13%13%13%12%
August8.5%5.6%4.0%3.9%
September4.8%6.0%7.6%13%
October15%13%8.2%4.1%
November1.6%0.7%0.4%0.2%
December0.3%0.3%0.3%0.2%

Neighboring states

  • Iowa: arrives the second week of September, 21 weeks later than Minnesota
  • Wisconsin: arrives late March, 1 week earlier than Minnesota
  • South Dakota: arrives mid September, 22 weeks later than Minnesota
  • North Dakota: arrives the second week of September, 21 weeks later than Minnesota

Common questions

When do Swamp Sparrows arrive in Minnesota?
Swamp Sparrows reach Minnesota in early April, are common by mid April, peak in early May (14% of checklists), and most are gone by mid October.
When do Swamp Sparrows leave Minnesota?
Most Swamp Sparrows have left Minnesota by mid October, when reports fall below half their usual rate. Stragglers are still reported until early November.
When is the best time to see a Swamp Sparrow in Minnesota?
The Swamp Sparrow is reported most often in early May, on about 14% of Minnesota checklists.
Where in Minnesota are Swamp Sparrows seen most often?
By county, Wilkin County, Mahnomen County, and Waseca County have the highest peak reporting rates for the Swamp Sparrow (counties with at least 200 checklists).