WhenToBird

Mniotilta varia · Parulidae

When Do Black-and-white Warblers Arrive in Ohio?

Adult female Black-and-white Warbler
Photo: Donald Davesne, CC BY 4.0 via iNaturalist

Black-and-white Warblers mostly pass through Ohio: they arrive in mid April, peak in the second week of May (15% of checklists), and most are gone by early June.

When to look

First arrivalsApr 15-21mid April
Common byApr 15-21mid April
PeakMay 8-14the second week of May
Most gone byJun 1-7early June

Best: the second week of May. First arrivals mid April; most are gone by early June. Peak: on about 15% of Ohio checklists.

  1. Jannot usually seen
  2. Febnot usually seen
  3. Marnot usually seen
  4. Aprcommon
  5. Maypeak season
  6. Junrare
  7. Julnot usually seen
  8. Auguncommon
  9. Sepcommon
  10. Octuncommon
  11. Novnot usually seen
  12. Decnot usually seen

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

0%5%10%15%20%Jan 1-7: 0.1% of 46637 checklistsJan 8-14: 0.1% of 31056 checklistsJan 15-21: 0.1% of 30129 checklistsJan 22-31: 0% of 38665 checklistsFeb 1-7: 0% of 27203 checklistsFeb 8-14: 0% of 30626 checklistsFeb 15-21: 0.1% of 40705 checklistsFeb 22-28: 0% of 31391 checklistsMar 1-7: 0% of 32914 checklistsMar 8-14: 0% of 33973 checklistsMar 15-21: 0% of 33678 checklistsMar 22-31: 0.1% of 49889 checklistsApr 1-7: 0.1% of 41225 checklistsApr 8-14: 0.5% of 47174 checklistsApr 15-21: 1.3% of 47017 checklistsApr 22-30: 6.2% of 73055 checklistsMay 1-7: 17% of 80637 checklistsMay 8-14: 16% of 102552 checklistsMay 15-21: 10% of 64582 checklistsMay 22-31: 2.6% of 52766 checklistsJun 1-7: 0.8% of 29279 checklistsJun 8-14: 0.9% of 25773 checklistsJun 15-21: 0.7% of 23163 checklistsJun 22-30: 0.6% of 27794 checklistsJul 1-7: 0.4% of 23334 checklistsJul 8-14: 0.5% of 22147 checklistsJul 15-21: 0.5% of 20998 checklistsJul 22-31: 0.5% of 29749 checklistsAug 1-7: 0.5% of 22899 checklistsAug 8-14: 0.5% of 21972 checklistsAug 15-21: 1.1% of 22215 checklistsAug 22-31: 2.9% of 35087 checklistsSep 1-7: 5.5% of 29148 checklistsSep 8-14: 7.7% of 28042 checklistsSep 15-21: 7.1% of 26751 checklistsSep 22-30: 4.9% of 32398 checklistsOct 1-7: 1.4% of 26209 checklistsOct 8-14: 0.4% of 26809 checklistsOct 15-21: 0.1% of 23504 checklistsOct 22-31: 0.1% of 33269 checklistsNov 1-7: 0.1% of 25563 checklistsNov 8-14: 0.1% of 23810 checklistsNov 15-21: 0% of 22127 checklistsNov 22-30: 0% of 29449 checklistsDec 1-7: 0.1% of 22370 checklistsDec 8-14: 0.1% of 21581 checklistsDec 15-21: 0% of 24232 checklistsDec 22-31: 0.1% of 36084 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 Ohio 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 Ohio

Best counties

Share of checklists at the peak
  1. Vinton CountyBest the second week of May · 228 checklists that week, 3,797 in all35%
  2. Scioto CountyBest late April · 1449 checklists that week, 5,497 in all32%
  3. Putnam CountyBest the second week of September · 18 checklists that week, 927 in all30%
  4. Hocking CountyBest early May · 561 checklists that week, 9,085 in all29%
  5. Lake CountyBest the second week of May · 2337 checklists that week, 59,983 in all25%
  6. Coshocton CountyBest the second week of September · 25 checklists that week, 2,932 in all24%

Best spots

Share of checklists at the peak
  1. Wayne National Forest (west)Athens County, best the second week of May · 27 checklists that week, 191 in all73%
  2. Conkles Hollow Dedicated Nature PreserveHocking County, best late April · 27 checklists that week, 372 in all67%
  3. Clear Creek Nature Preserve (west)Hocking County, best early June · 30 checklists that week, 417 in all66%
  4. Clear Creek Nature Preserve (northwest)Hocking County, best late April · 43 checklists that week, 301 in all65%
  5. Mill Creek ParkMahoning County, best the second week of May · 51 checklists that week, 516 in all62%
  6. Lake Hope State ParkVinton County, best mid April · 22 checklists that week, 266 in all59%

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

Best time of day

In Ohio, the Black-and-white Warbler is most often listed on checklists started between 6 and 8 am (6.9% of those checklists).

0%2%4%6%8%12 am: too few checklists (574) to judge1 am: too few checklists (609) to judge2 am: too few checklists (466) to judge3 am: too few checklists (478) to judge4 am: too few checklists (662) to judge5 am: too few checklists (4366) to judge6 am: 7.9% of 43093 checklists7 am: 6.6% of 142017 checklists8 am: 4.5% of 205296 checklists9 am: 3.4% of 196322 checklists10 am: 2.9% of 170882 checklists11 am: 2.5% of 144567 checklists12 pm: 2.4% of 126551 checklists1 pm: 2.3% of 117855 checklists2 pm: 2.3% of 112869 checklists3 pm: 2.2% of 109786 checklists4 pm: 2.2% of 103116 checklists5 pm: 2.4% of 78409 checklists6 pm: 2.3% of 56785 checklists7 pm: 1.3% of 37923 checklists8 pm: too few checklists (14954) to judge9 pm: too few checklists (2710) to judge10 pm: too few checklists (854) to judge11 pm: too few checklists (486) 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
January0.1%0.1%0.1%0%
February0%0%0.1%0%
March0%0%0%0.1%
April0.1%0.5%1.3%6.2%
May17%16%10%2.6%
June0.8%0.9%0.7%0.6%
July0.4%0.5%0.5%0.5%
August0.5%0.5%1.1%2.9%
September5.5%7.7%7.1%4.9%
October1.4%0.4%0.1%0.1%
November0.1%0.1%0%0%
December0.1%0.1%0%0.1%

Neighboring states

  • West Virginia: arrives early April, 2 weeks earlier than Ohio
  • Indiana: arrives mid April, in the same week than Ohio
  • Michigan: arrives late April, 1 week later than Ohio
  • Kentucky: arrives late March, 3 weeks earlier than Ohio

Common questions

When do Black-and-white Warblers arrive in Ohio?
Black-and-white Warblers mostly pass through Ohio: they arrive in mid April, peak in the second week of May (15% of checklists), and most are gone by early June.
When do Black-and-white Warblers leave Ohio?
Most Black-and-white Warblers have left Ohio by early June, when reports fall below half their usual rate.
When is the best time to see a Black-and-white Warbler in Ohio?
The Black-and-white Warbler is reported most often in the second week of May, on about 15% of Ohio checklists.
Where in Ohio are Black-and-white Warblers seen most often?
By county, Vinton County, Scioto County, and Putnam County have the highest peak reporting rates for the Black-and-white Warbler (counties with at least 200 checklists).