WhenToBird

Spizelloides arborea · Passerellidae

When Do American Tree Sparrows Arrive in Minnesota?

Adult American Tree Sparrow
Photo: Michael, CC BY 4.0 via iNaturalist

American Tree Sparrows are winter birds in Minnesota: the first arrive in early October, they are common by mid October, peak in early November (19% of checklists), and most are gone by late April.

When to look

First arrivalsOct 1-7early October
Common byOct 15-21mid October
PeakNov 1-7early November
Most gone byApr 22-30late April

Best: early November. First arrivals early October; most are gone by late April. Peak: on about 19% of Minnesota checklists.

  1. Jancommon
  2. Febuncommon
  3. Marcommon
  4. Aprcommon
  5. Mayrare
  6. Junnot usually seen
  7. Julnot usually seen
  8. Augnot usually seen
  9. Sepnot usually seen
  10. Octpeak season
  11. Novpeak season
  12. Deccommon

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

0%10%20%30%Jan 1-7: 8.6% of 20628 checklistsJan 8-14: 7.6% of 14594 checklistsJan 15-21: 7.7% of 14238 checklistsJan 22-31: 7.3% of 20725 checklistsFeb 1-7: 6.8% of 14484 checklistsFeb 8-14: 6.2% of 15988 checklistsFeb 15-21: 6.3% of 20718 checklistsFeb 22-28: 6.7% of 15754 checklistsMar 1-7: 8.2% of 16125 checklistsMar 8-14: 10% of 19035 checklistsMar 15-21: 11% of 19586 checklistsMar 22-31: 12% of 30192 checklistsApr 1-7: 13% of 24262 checklistsApr 8-14: 13% of 30223 checklistsApr 15-21: 8.6% of 29085 checklistsApr 22-30: 5.5% of 43574 checklistsMay 1-7: 2.0% of 39300 checklistsMay 8-14: 0.3% of 45927 checklistsMay 15-21: 0.1% of 36632 checklistsMay 22-31: 0.1% of 43809 checklistsJun 1-7: 0% of 23418 checklistsJun 8-14: 0% of 20450 checklistsJun 15-21: 0% of 19470 checklistsJun 22-30: 0% of 23418 checklistsJul 1-7: 0% of 19104 checklistsJul 8-14: 0% of 16927 checklistsJul 15-21: 0% of 15635 checklistsJul 22-31: 0% of 22073 checklistsAug 1-7: 0% of 16255 checklistsAug 8-14: 0% of 16840 checklistsAug 15-21: 0% of 17475 checklistsAug 22-31: 0% of 26545 checklistsSep 1-7: 0% of 20750 checklistsSep 8-14: 0% of 18494 checklistsSep 15-21: 0.1% of 18215 checklistsSep 22-30: 0.2% of 24463 checklistsOct 1-7: 1.1% of 18252 checklistsOct 8-14: 3.2% of 19527 checklistsOct 15-21: 9.4% of 17098 checklistsOct 22-31: 19% of 24570 checklistsNov 1-7: 21% of 16744 checklistsNov 8-14: 18% of 13483 checklistsNov 15-21: 14% of 12525 checklistsNov 22-30: 11% of 17023 checklistsDec 1-7: 8.3% of 11645 checklistsDec 8-14: 8.7% of 11567 checklistsDec 15-21: 9.8% of 13343 checklistsDec 22-31: 9.2% 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. Lac qui Parle CountyBest the second week of November · 24 checklists that week, 3,681 in all46%
  2. Steele CountyBest early December · 27 checklists that week, 4,784 in all44%
  3. Wabasha CountyBest mid February · 152 checklists that week, 6,548 in all42%
  4. Martin CountyBest the second week of January · 10 checklists that week, 1,016 in all42%
  5. Murray CountyBest the second week of November · 17 checklists that week, 1,513 in all41%
  6. Jackson CountyBest mid November · 15 checklists that week, 1,501 in all39%

Best spots

Share of checklists at the peak
  1. Western Waterfront TrailSt. Louis County, best late October · 59 checklists that week, 1,973 in all76%
  2. Rapids LakeCarver County, best the second week of March · 22 checklists that week, 591 in all75%
  3. Grey Cloud Dunes State Scientific and Natural AreaWashington County, best early November · 20 checklists that week, 2,212 in all75%
  4. Prairie LakeHennepin County, best early November · 25 checklists that week, 1,833 in all74%
  5. Long Meadow LakeHennepin County, best early November · 111 checklists that week, 10,107 in all73%

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

Best time of day

In Minnesota, the American Tree Sparrow is most often listed on checklists started between 8 and 10 am (6.2% 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: 3.1% of 35775 checklists7 am: 5.5% of 90565 checklists8 am: 6.2% of 110612 checklists9 am: 6.2% of 106128 checklists10 am: 5.9% of 96131 checklists11 am: 5.7% of 83750 checklists12 pm: 5.5% of 76254 checklists1 pm: 5.4% of 73480 checklists2 pm: 5.6% of 73703 checklists3 pm: 5.7% of 75249 checklists4 pm: 5.0% of 68810 checklists5 pm: 3.7% of 51899 checklists6 pm: 2.7% of 38524 checklists7 pm: 1.6% 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
January8.6%7.6%7.7%7.3%
February6.8%6.2%6.3%6.7%
March8.2%10%11%12%
April13%13%8.6%5.5%
May2.0%0.3%0.1%0.1%
June0%0%0%0%
July0%0%0%0%
August0%0%0%0%
September0%0%0.1%0.2%
October1.1%3.2%9.4%19%
November21%18%14%11%
December8.3%8.7%9.8%9.2%

Neighboring states

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

Common questions

When do American Tree Sparrows arrive in Minnesota?
American Tree Sparrows are winter birds in Minnesota: the first arrive in early October, they are common by mid October, peak in early November (19% of checklists), and most are gone by late April.
When do American Tree Sparrows leave Minnesota?
Most American Tree Sparrows have left Minnesota by late April, when reports fall below half their usual rate. Stragglers are still reported until early May.
When is the best time to see a American Tree Sparrow in Minnesota?
The American Tree Sparrow is reported most often in early November, on about 19% of Minnesota checklists.
Where in Minnesota are American Tree Sparrows seen most often?
By county, Lac qui Parle County, Steele County, and Wabasha County have the highest peak reporting rates for the American Tree Sparrow (counties with at least 200 checklists).