WhenToBird

Falco columbarius · Falconidae

When Do Merlins Arrive in Ohio?

Adult female Merlin
Photo: Cricket Raspet, CC BY 4.0 via iNaturalist

Merlins are winter birds in Ohio: they arrive in mid August, peak in the second week of October (1.3% of checklists), and most are gone by early March.

When to look

First arrivalsAug 15-21mid August
Common byAug 15-21mid August
PeakOct 8-14the second week of October
Most gone byMar 1-7early March

Best: the second week of October. First arrivals mid August; most are gone by early March. Peak: on about 1.3% of Ohio checklists.

  1. Janpeak season
  2. Febpeak season
  3. Marcommon
  4. Apruncommon
  5. Mayuncommon
  6. Junrare
  7. Juluncommon
  8. Augcommon
  9. Seppeak season
  10. Octpeak season
  11. Novpeak season
  12. Decpeak season

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

0%0.5%1%1.5%Jan 1-7: 1.2% of 46637 checklistsJan 8-14: 1.2% of 31056 checklistsJan 15-21: 0.9% of 30129 checklistsJan 22-31: 1.2% of 38665 checklistsFeb 1-7: 1.2% of 27203 checklistsFeb 8-14: 0.8% of 30626 checklistsFeb 15-21: 0.6% of 40705 checklistsFeb 22-28: 0.7% of 31391 checklistsMar 1-7: 0.5% of 32914 checklistsMar 8-14: 0.5% of 33973 checklistsMar 15-21: 0.4% of 33678 checklistsMar 22-31: 0.5% of 49889 checklistsApr 1-7: 0.3% of 41225 checklistsApr 8-14: 0.5% of 47174 checklistsApr 15-21: 0.4% of 47017 checklistsApr 22-30: 0.4% of 73055 checklistsMay 1-7: 0.4% of 80637 checklistsMay 8-14: 0.2% of 102552 checklistsMay 15-21: 0.1% of 64582 checklistsMay 22-31: 0.1% of 52766 checklistsJun 1-7: 0.1% of 29279 checklistsJun 8-14: 0.1% of 25773 checklistsJun 15-21: 0.1% of 23163 checklistsJun 22-30: 0.1% of 27794 checklistsJul 1-7: 0.1% of 23334 checklistsJul 8-14: 0.1% of 22147 checklistsJul 15-21: 0.2% of 20998 checklistsJul 22-31: 0.2% of 29749 checklistsAug 1-7: 0.2% of 22899 checklistsAug 8-14: 0.4% of 21972 checklistsAug 15-21: 0.5% of 22215 checklistsAug 22-31: 0.7% of 35087 checklistsSep 1-7: 0.8% of 29148 checklistsSep 8-14: 1.0% of 28042 checklistsSep 15-21: 1.0% of 26751 checklistsSep 22-30: 1.2% of 32398 checklistsOct 1-7: 1.3% of 26209 checklistsOct 8-14: 1.4% of 26809 checklistsOct 15-21: 1.2% of 23504 checklistsOct 22-31: 1.2% of 33269 checklistsNov 1-7: 1.2% of 25563 checklistsNov 8-14: 1.0% of 23810 checklistsNov 15-21: 1.0% of 22127 checklistsNov 22-30: 1.0% of 29449 checklistsDec 1-7: 1.0% of 22370 checklistsDec 8-14: 1.1% of 21581 checklistsDec 15-21: 1.5% of 24232 checklistsDec 22-31: 1.2% 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. Ashtabula CountyBest mid August · 230 checklists that week, 12,390 in all8.3%
  2. Preble CountyBest mid December · 147 checklists that week, 8,090 in all4.6%
  3. Lake CountyBest early October · 1104 checklists that week, 59,983 in all4.1%
  4. Greene CountyBest the second week of October · 374 checklists that week, 23,199 in all4.0%
  5. Mahoning CountyBest early November · 251 checklists that week, 14,421 in all4.0%
  6. Harrison CountyBest late October · 45 checklists that week, 3,150 in all3.9%

Best spots

Share of checklists at the peak
  1. LawndaleSummit County, best the second week of November · 21 checklists that week, 755 in all93%
  2. Buckeye Swamp (Walhalla Creek)Franklin County, best late January · 32 checklists that week, 522 in all79%
  3. Nike ParkCuyahoga County, best early January · 56 checklists that week, 213 in all56%
  4. Little Cuyahoga RiverSummit County, best late December · 22 checklists that week, 1,084 in all51%

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

Best time of day

In Ohio, the Merlin is most often listed on checklists started between 4 and 6 pm (0.8% of those checklists).

0%0.5%1%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: 0.5% of 43093 checklists7 am: 0.8% of 142017 checklists8 am: 0.7% of 205296 checklists9 am: 0.6% of 196322 checklists10 am: 0.5% of 170882 checklists11 am: 0.5% of 144567 checklists12 pm: 0.5% of 126551 checklists1 pm: 0.6% of 117855 checklists2 pm: 0.6% of 112869 checklists3 pm: 0.7% of 109786 checklists4 pm: 0.8% of 103116 checklists5 pm: 0.8% of 78409 checklists6 pm: 0.5% of 56785 checklists7 pm: 0.5% 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
January1.2%1.2%0.9%1.2%
February1.2%0.8%0.6%0.7%
March0.5%0.5%0.4%0.5%
April0.3%0.5%0.4%0.4%
May0.4%0.2%0.1%0.1%
June0.1%0.1%0.1%0.1%
July0.1%0.1%0.2%0.2%
August0.2%0.4%0.5%0.7%
September0.8%1.0%1.0%1.2%
October1.3%1.4%1.2%1.2%
November1.2%1.0%1.0%1.0%
December1.0%1.1%1.5%1.2%

Neighboring states

  • West Virginia: arrives the second week of July, 5 weeks earlier than Ohio
  • Indiana: arrives mid August, in the same week than Ohio
  • Michigan: arrives late March, 19 weeks earlier than Ohio
  • Kentucky: arrives mid September, 4 weeks later than Ohio

Common questions

When do Merlins arrive in Ohio?
Merlins are winter birds in Ohio: they arrive in mid August, peak in the second week of October (1.3% of checklists), and most are gone by early March.
When do Merlins leave Ohio?
Most Merlins have left Ohio by early March, when reports fall below half their usual rate.
When is the best time to see a Merlin in Ohio?
The Merlin is reported most often in the second week of October, on about 1.3% of Ohio checklists.
Where in Ohio are Merlins seen most often?
By county, Ashtabula County, Preble County, and Lake County have the highest peak reporting rates for the Merlin (counties with at least 200 checklists).