WhenToBird

Setophaga magnolia · Parulidae

When Do Magnolia Warblers Arrive in Michigan?

Adult male Magnolia Warbler
Photo: carbenoid, CC BY 4.0 via iNaturalist

Magnolia Warblers reach Michigan in the second week of August, are common by mid August, peak in the second week of September (12% of checklists), and most are gone by early October.

When to look

First arrivalsAug 8-14the second week of August
Common byAug 15-21mid August
PeakSep 8-14the second week of September
Most gone byOct 1-7early October

Best: the second week of September. First arrivals the second week of August; most are gone by early October. Peak: on about 12% of Michigan checklists.

  1. Jannot usually seen
  2. Febnot usually seen
  3. Marnot usually seen
  4. Aprrare
  5. Maypeak season
  6. Jununcommon
  7. Julrare
  8. Augcommon
  9. Seppeak season
  10. Octuncommon
  11. Novnot usually seen
  12. Decnot usually seen

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

0%5%10%15%Jan 1-7: 0% of 38160 checklistsJan 8-14: 0% of 24696 checklistsJan 15-21: 0% of 23771 checklistsJan 22-31: 0% of 31347 checklistsFeb 1-7: 0% of 23225 checklistsFeb 8-14: 0% of 27398 checklistsFeb 15-21: 0% of 36606 checklistsFeb 22-28: 0% of 27127 checklistsMar 1-7: 0% of 29700 checklistsMar 8-14: 0% of 31587 checklistsMar 15-21: 0% of 32118 checklistsMar 22-31: 0% of 47777 checklistsApr 1-7: 0% of 38557 checklistsApr 8-14: 0% of 42207 checklistsApr 15-21: 0.1% of 42759 checklistsApr 22-30: 0.1% of 64458 checklistsMay 1-7: 1.8% of 60998 checklistsMay 8-14: 9.4% of 72091 checklistsMay 15-21: 15% of 59058 checklistsMay 22-31: 6.0% of 64724 checklistsJun 1-7: 1.7% of 35990 checklistsJun 8-14: 1.2% of 32595 checklistsJun 15-21: 1.0% of 30017 checklistsJun 22-30: 0.8% of 33988 checklistsJul 1-7: 0.7% of 28708 checklistsJul 8-14: 0.6% of 25175 checklistsJul 15-21: 0.4% of 24084 checklistsJul 22-31: 0.3% of 33522 checklistsAug 1-7: 0.4% of 25098 checklistsAug 8-14: 0.6% of 24353 checklistsAug 15-21: 2.2% of 25059 checklistsAug 22-31: 7.6% of 37489 checklistsSep 1-7: 13% of 28410 checklistsSep 8-14: 13% of 27887 checklistsSep 15-21: 11% of 26614 checklistsSep 22-30: 8.0% of 32557 checklistsOct 1-7: 2.5% of 25844 checklistsOct 8-14: 0.4% of 27741 checklistsOct 15-21: 0.1% of 24693 checklistsOct 22-31: 0.1% of 32460 checklistsNov 1-7: 0.1% of 23660 checklistsNov 8-14: 0.1% of 21542 checklistsNov 15-21: 0% of 19922 checklistsNov 22-30: 0% of 25069 checklistsDec 1-7: 0% of 18272 checklistsDec 8-14: 0% of 18961 checklistsDec 15-21: 0% of 24171 checklistsDec 22-31: 0% 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 the second week of September · 88 checklists that week, 4,675 in all32%
  2. Montcalm CountyBest the second week of September · 74 checklists that week, 4,510 in all30%
  3. Keweenaw CountyBest early June · 496 checklists that week, 12,437 in all27%
  4. Macomb CountyBest the second week of September · 952 checklists that week, 61,232 in all25%
  5. Iosco CountyBest mid May · 4977 checklists that week, 31,409 in all25%
  6. Gratiot CountyBest mid September · 61 checklists that week, 5,892 in all24%

Best spots

Share of checklists at the peak
  1. Burchfield Park and Nature AreaIngham County, best mid September · 31 checklists that week, 350 in all65%
  2. Donald Lamoreaux ParkKent County, best late August · 28 checklists that week, 583 in all63%
  3. Warren Dunes State ParkBerrien County, best the second week of September · 107 checklists that week, 2,854 in all62%
  4. For-Mar Nature Preserve and ArboretumGenesee County, best the second week of September · 27 checklists that week, 810 in all61%
  5. George Suarez Friendship WoodsOakland County, best the second week of September · 109 checklists that week, 4,678 in all61%
  6. Bete GriseKeweenaw County, best late May · 57 checklists that week, 433 in all60%

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

Best time of day

In Michigan, the Magnolia Warbler is most often listed on checklists started between 6 and 8 am (5.3% of those checklists).

0%2%4%6%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: 5.4% of 39298 checklists7 am: 5.3% of 120344 checklists8 am: 4.1% of 180109 checklists9 am: 3.2% of 171966 checklists10 am: 2.3% of 156332 checklists11 am: 1.9% of 134964 checklists12 pm: 1.6% of 120967 checklists1 pm: 1.7% of 113852 checklists2 pm: 1.5% of 110773 checklists3 pm: 1.4% of 105530 checklists4 pm: 1.7% of 100958 checklists5 pm: 2.0% of 80085 checklists6 pm: 2.0% of 62883 checklists7 pm: 1.1% 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%0%0%0%
February0%0%0%0%
March0%0%0%0%
April0%0%0.1%0.1%
May1.8%9.4%15%6.0%
June1.7%1.2%1.0%0.8%
July0.7%0.6%0.4%0.3%
August0.4%0.6%2.2%7.6%
September13%13%11%8.0%
October2.5%0.4%0.1%0.1%
November0.1%0.1%0%0%
December0%0%0%0%

Neighboring states

  • Ohio: arrives mid August, 1 week later than Michigan
  • Indiana: arrives mid August, 1 week later than Michigan
  • Illinois: arrives mid August, 1 week later than Michigan
  • Wisconsin: arrives mid August, 1 week later than Michigan

Common questions

When do Magnolia Warblers arrive in Michigan?
Magnolia Warblers reach Michigan in the second week of August, are common by mid August, peak in the second week of September (12% of checklists), and most are gone by early October.
When do Magnolia Warblers leave Michigan?
Most Magnolia Warblers have left Michigan by early October, when reports fall below half their usual rate.
When is the best time to see a Magnolia Warbler in Michigan?
The Magnolia Warbler is reported most often in the second week of September, on about 12% of Michigan checklists.
Where in Michigan are Magnolia Warblers seen most often?
By county, Ogemaw County, Montcalm County, and Keweenaw County have the highest peak reporting rates for the Magnolia Warbler (counties with at least 200 checklists).