WhenToBird

Passerella iliaca · Passerellidae

When Do Fox Sparrows Arrive in Michigan?

Adult Fox Sparrow
Photo: Kevin Krebs, CC BY 4.0 via iNaturalist

Fox Sparrows arrive in Michigan in the second week of March, peak in the second week of April (5.4% of checklists), and most are gone by late April.

When to look

First arrivalsMar 8-14the second week of March
Common byMar 8-14the second week of March
PeakApr 8-14the second week of April
Most gone byApr 22-30late April

Best: the second week of April. First arrivals the second week of March; most are gone by late April. Peak: on about 5.4% of Michigan checklists.

  1. Januncommon
  2. Febrare
  3. Marpeak season
  4. Aprpeak season
  5. Mayrare
  6. Junnot usually seen
  7. Julnot usually seen
  8. Augnot usually seen
  9. Seprare
  10. Octcommon
  11. Novpeak season
  12. Decuncommon

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

0%2%4%6%8%Jan 1-7: 0.5% of 38160 checklistsJan 8-14: 0.6% of 24696 checklistsJan 15-21: 1.0% of 23771 checklistsJan 22-31: 0.8% of 31347 checklistsFeb 1-7: 0.7% of 23225 checklistsFeb 8-14: 0.6% of 27398 checklistsFeb 15-21: 0.4% of 36606 checklistsFeb 22-28: 0.4% of 27127 checklistsMar 1-7: 0.4% of 29700 checklistsMar 8-14: 0.8% of 31587 checklistsMar 15-21: 2.2% of 32118 checklistsMar 22-31: 4.0% of 47777 checklistsApr 1-7: 6.2% of 38557 checklistsApr 8-14: 5.6% of 42207 checklistsApr 15-21: 4.4% of 42759 checklistsApr 22-30: 1.5% of 64458 checklistsMay 1-7: 0.3% of 60998 checklistsMay 8-14: 0.1% of 72091 checklistsMay 15-21: 0.1% of 59058 checklistsMay 22-31: 0% of 64724 checklistsJun 1-7: 0% of 35990 checklistsJun 8-14: 0% of 32595 checklistsJun 15-21: 0.1% of 30017 checklistsJun 22-30: 0% of 33988 checklistsJul 1-7: 0% of 28708 checklistsJul 8-14: 0% of 25175 checklistsJul 15-21: 0% of 24084 checklistsJul 22-31: 0% of 33522 checklistsAug 1-7: 0% of 25098 checklistsAug 8-14: 0% of 24353 checklistsAug 15-21: 0% of 25059 checklistsAug 22-31: 0% of 37489 checklistsSep 1-7: 0.1% of 28410 checklistsSep 8-14: 0.1% of 27887 checklistsSep 15-21: 0.1% of 26614 checklistsSep 22-30: 0.3% of 32557 checklistsOct 1-7: 0.7% of 25844 checklistsOct 8-14: 1.6% of 27741 checklistsOct 15-21: 2.8% of 24693 checklistsOct 22-31: 4.0% of 32460 checklistsNov 1-7: 4.7% of 23660 checklistsNov 8-14: 4.7% of 21542 checklistsNov 15-21: 3.7% of 19922 checklistsNov 22-30: 2.1% of 25069 checklistsDec 1-7: 1.3% of 18272 checklistsDec 8-14: 0.8% of 18961 checklistsDec 15-21: 0.6% of 24171 checklistsDec 22-31: 0.6% of 30908 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 Michigan 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 Michigan

Best counties

Share of checklists at the peak
  1. Ogemaw CountyBest late October · 80 checklists that week, 4,675 in all48%
  2. Ontonagon CountyBest mid April · 44 checklists that week, 3,548 in all24%
  3. Keweenaw CountyBest mid April · 199 checklists that week, 12,437 in all21%
  4. Osceola CountyBest early April · 122 checklists that week, 5,623 in all15%
  5. Marquette CountyBest mid April · 968 checklists that week, 25,107 in all15%
  6. Newaygo CountyBest late March · 160 checklists that week, 5,044 in all14%

Best spots

Share of checklists at the peak
  1. Warren Dunes State ParkBerrien County, best early April · 63 checklists that week, 2,854 in all64%
  2. Klienstuck PreserveKalamazoo County, best late March · 118 checklists that week, 2,273 in all60%
  3. Sarett Nature CenterBerrien County, best late March · 38 checklists that week, 1,402 in all57%
  4. Cedar LakeWashtenaw County, best early November · 85 checklists that week, 526 in all54%
  5. Sarett Nature Center (Blue Creek)Berrien County, best early April · 38 checklists that week, 859 in all53%

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

Best time of day

In Michigan, the Fox Sparrow is most often listed on checklists started between 8 and 10 am (1.7% of those checklists).

0%0.5%1%1.5%2%12 am: too few checklists (712) to judge1 am: too few checklists (592) to judge2 am: too few checklists (532) to judge3 am: too few checklists (516) to judge4 am: too few checklists (1592) to judge5 am: too few checklists (6849) to judge6 am: 0.7% of 39298 checklists7 am: 1.4% of 120344 checklists8 am: 1.8% of 180109 checklists9 am: 1.5% of 171966 checklists10 am: 1.3% of 156332 checklists11 am: 1.1% of 134964 checklists12 pm: 1.0% of 120967 checklists1 pm: 1.1% of 113852 checklists2 pm: 1.1% of 110773 checklists3 pm: 1.1% of 105530 checklists4 pm: 1.2% of 100958 checklists5 pm: 1.0% of 80085 checklists6 pm: 0.9% of 62883 checklists7 pm: 0.6% of 44912 checklists8 pm: too few checklists (21062) to judge9 pm: too few checklists (5920) to judge10 pm: too few checklists (1629) to judge11 pm: too few checklists (775) 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
January0.5%0.6%1.0%0.8%
February0.7%0.6%0.4%0.4%
March0.4%0.8%2.2%4.0%
April6.2%5.6%4.4%1.5%
May0.3%0.1%0.1%0%
June0%0%0.1%0%
July0%0%0%0%
August0%0%0%0%
September0.1%0.1%0.1%0.3%
October0.7%1.6%2.8%4.0%
November4.7%4.7%3.7%2.1%
December1.3%0.8%0.6%0.6%

Neighboring states

  • Ohio: arrives mid October, 19 weeks earlier than Michigan
  • Indiana: arrives the second week of October, 20 weeks earlier than Michigan
  • Illinois: arrives early October, 21 weeks earlier than Michigan
  • Wisconsin: arrives early March, 1 week earlier than Michigan

Common questions

When do Fox Sparrows arrive in Michigan?
Fox Sparrows arrive in Michigan in the second week of March, peak in the second week of April (5.4% of checklists), and most are gone by late April.
When do Fox Sparrows leave Michigan?
Most Fox Sparrows have left Michigan by late April, when reports fall below half their usual rate.
When is the best time to see a Fox Sparrow in Michigan?
The Fox Sparrow is reported most often in the second week of April, on about 5.4% of Michigan checklists.
Where in Michigan are Fox Sparrows seen most often?
By county, Ogemaw County, Ontonagon County, and Keweenaw County have the highest peak reporting rates for the Fox Sparrow (counties with at least 200 checklists).