WhenToBird

Astur cooperii · Accipitridae

When Do Cooper's Hawks Arrive in Ohio?

Adult male Cooper's Hawk
Photo: Shirley Zundell, CC BY 4.0 via iNaturalist

Cooper's Hawks are in Ohio all year, but most are here in fall: numbers build from early September, peak in the second week of October (7.9% of checklists), and fall back by the second week of November. In the quietest week (early June) they are still on about 2.8% of checklists.

When to look

Numbers buildSep 1-7early September
PeakOct 8-14the second week of October
Fall back byNov 8-14the second week of November
FewestJun 1-7early June

Best: the second week of October. Here all year; numbers build from early September and fall back by the second week of November. Peak: on about 7.9% of Ohio checklists.

  1. Jancommon
  2. Febcommon
  3. Marcommon
  4. Aprpeak season
  5. Maycommon
  6. Jununcommon
  7. Julcommon
  8. Augcommon
  9. Seppeak season
  10. Octpeak season
  11. Novpeak season
  12. Deccommon

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

0%5%10%Jan 1-7: 5.0% of 46637 checklistsJan 8-14: 5.4% of 31056 checklistsJan 15-21: 5.3% of 30129 checklistsJan 22-31: 5.1% of 38665 checklistsFeb 1-7: 4.8% of 27203 checklistsFeb 8-14: 4.8% of 30626 checklistsFeb 15-21: 4.6% of 40705 checklistsFeb 22-28: 4.4% of 31391 checklistsMar 1-7: 4.4% of 32914 checklistsMar 8-14: 5.0% of 33973 checklistsMar 15-21: 5.1% of 33678 checklistsMar 22-31: 5.5% of 49889 checklistsApr 1-7: 6.1% of 41225 checklistsApr 8-14: 6.4% of 47174 checklistsApr 15-21: 6.4% of 47017 checklistsApr 22-30: 6.4% of 73055 checklistsMay 1-7: 5.3% of 80637 checklistsMay 8-14: 3.8% of 102552 checklistsMay 15-21: 3.0% of 64582 checklistsMay 22-31: 2.8% of 52766 checklistsJun 1-7: 2.7% of 29279 checklistsJun 8-14: 3.0% of 25773 checklistsJun 15-21: 3.2% of 23163 checklistsJun 22-30: 3.1% of 27794 checklistsJul 1-7: 3.0% of 23334 checklistsJul 8-14: 3.0% of 22147 checklistsJul 15-21: 3.0% of 20998 checklistsJul 22-31: 3.2% of 29749 checklistsAug 1-7: 4.1% of 22899 checklistsAug 8-14: 4.6% of 21972 checklistsAug 15-21: 4.6% of 22215 checklistsAug 22-31: 5.2% of 35087 checklistsSep 1-7: 5.9% of 29148 checklistsSep 8-14: 5.8% of 28042 checklistsSep 15-21: 6.4% of 26751 checklistsSep 22-30: 7.5% of 32398 checklistsOct 1-7: 8.0% of 26209 checklistsOct 8-14: 8.2% of 26809 checklistsOct 15-21: 7.5% of 23504 checklistsOct 22-31: 6.9% of 33269 checklistsNov 1-7: 6.0% of 25563 checklistsNov 8-14: 5.9% of 23810 checklistsNov 15-21: 4.7% of 22127 checklistsNov 22-30: 5.0% of 29449 checklistsDec 1-7: 5.4% of 22370 checklistsDec 8-14: 5.4% of 21581 checklistsDec 15-21: 6.2% of 24232 checklistsDec 22-31: 5.4% 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. Meigs CountyBest late December · 22 checklists that week, 1,139 in all18%
  2. Van Wert CountyBest the second week of August · 63 checklists that week, 2,246 in all17%
  3. Mahoning CountyBest early October · 236 checklists that week, 14,421 in all15%
  4. Putnam CountyBest early February · 12 checklists that week, 927 in all15%
  5. Hardin CountyBest early August · 77 checklists that week, 4,583 in all15%
  6. Williams CountyBest mid February · 69 checklists that week, 2,778 in all13%

Best spots

Share of checklists at the peak
  1. Litchford RunFranklin County, best the second week of October · 24 checklists that week, 1,116 in all56%
  2. Burnet WoodsHamilton County, best the second week of April · 22 checklists that week, 1,125 in all48%
  3. Glen Echo Ravine Restoration & ProtectionFranklin County, best the second week of April · 68 checklists that week, 2,272 in all36%
  4. Scioto Audubon Metro Park (Greenlawn Avenue Low Head Reservoir)Franklin County, best late March · 26 checklists that week, 399 in all35%

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

Best time of day

In Ohio, the Cooper's Hawk is most often listed on checklists started between 6 and 8 am (7.0% 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: 5.9% of 43093 checklists7 am: 7.3% of 142017 checklists8 am: 6.7% of 205296 checklists9 am: 5.7% of 196322 checklists10 am: 4.9% of 170882 checklists11 am: 4.4% of 144567 checklists12 pm: 4.3% of 126551 checklists1 pm: 4.1% of 117855 checklists2 pm: 4.2% of 112869 checklists3 pm: 4.4% of 109786 checklists4 pm: 4.4% of 103116 checklists5 pm: 4.1% of 78409 checklists6 pm: 3.7% of 56785 checklists7 pm: 3.0% 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
January5.0%5.4%5.3%5.1%
February4.8%4.8%4.6%4.4%
March4.4%5.0%5.1%5.5%
April6.1%6.4%6.4%6.4%
May5.3%3.8%3.0%2.8%
June2.7%3.0%3.2%3.1%
July3.0%3.0%3.0%3.2%
August4.1%4.6%4.6%5.2%
September5.9%5.8%6.4%7.5%
October8.0%8.2%7.5%6.9%
November6.0%5.9%4.7%5.0%
December5.4%5.4%6.2%5.4%

Neighboring states

  • West Virginia: arrives the second week of June, 11 weeks earlier than Ohio
  • Indiana: arrives the second week of September, 1 week later than Ohio
  • Michigan: arrives the second week of July, 7 weeks earlier than Ohio
  • Kentucky: arrives mid August, 2 weeks earlier than Ohio

Common questions

When do Cooper's Hawks arrive in Ohio?
Cooper's Hawks are in Ohio all year, but most are here in fall: numbers build from early September, peak in the second week of October (7.9% of checklists), and fall back by the second week of November. In the quietest week (early June) they are still on about 2.8% of checklists.
When do Cooper's Hawks leave Ohio?
Cooper's Hawks never fully leave Ohio: numbers fall back below half their usual rate by the second week of November, but some are still reported in every week, about 2.8% of checklists at the low.
When is the best time to see a Cooper's Hawk in Ohio?
The Cooper's Hawk is reported most often in the second week of October, on about 7.9% of Ohio checklists.
Where in Ohio are Cooper's Hawks seen most often?
By county, Meigs County, Van Wert County, and Mahoning County have the highest peak reporting rates for the Cooper's Hawk (counties with at least 200 checklists).