WhenToBird

Chroicocephalus philadelphia · Laridae

When Do Bonaparte's Gulls Arrive in Ohio?

Adult Bonaparte's Gull
Photo: Kevin Krebs, CC BY 4.0 via iNaturalist

Bonaparte's Gulls are winter birds in Ohio: they arrive in early August, peak in the second week of November (12% of checklists), and most are gone by mid January.

When to look

First arrivalsAug 1-7early August
Common byAug 1-7early August
PeakNov 8-14the second week of November
Most gone byJan 15-21mid January

Best: the second week of November. First arrivals early August; most are gone by mid January. Peak: on about 12% of Ohio checklists.

  1. Januncommon
  2. Febnot usually seen
  3. Marcommon
  4. Aprcommon
  5. Mayuncommon
  6. Junrare
  7. Julrare
  8. Auguncommon
  9. Sepuncommon
  10. Octcommon
  11. Novpeak season
  12. Deccommon

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

0%5%10%15%Jan 1-7: 2.7% of 46637 checklistsJan 8-14: 1.8% of 31056 checklistsJan 15-21: 1.2% of 30129 checklistsJan 22-31: 0.5% of 38665 checklistsFeb 1-7: 0.3% of 27203 checklistsFeb 8-14: 0.2% of 30626 checklistsFeb 15-21: 0.2% of 40705 checklistsFeb 22-28: 0.3% of 31391 checklistsMar 1-7: 1.0% of 32914 checklistsMar 8-14: 2.0% of 33973 checklistsMar 15-21: 4.4% of 33678 checklistsMar 22-31: 6.8% of 49889 checklistsApr 1-7: 7.5% of 41225 checklistsApr 8-14: 6.7% of 47174 checklistsApr 15-21: 4.9% of 47017 checklistsApr 22-30: 3.4% of 73055 checklistsMay 1-7: 2.9% of 80637 checklistsMay 8-14: 2.5% of 102552 checklistsMay 15-21: 1.3% of 64582 checklistsMay 22-31: 0.6% of 52766 checklistsJun 1-7: 0.3% of 29279 checklistsJun 8-14: 0.4% of 25773 checklistsJun 15-21: 0.3% of 23163 checklistsJun 22-30: 0.5% of 27794 checklistsJul 1-7: 0.9% of 23334 checklistsJul 8-14: 0.9% of 22147 checklistsJul 15-21: 0.7% of 20998 checklistsJul 22-31: 0.8% of 29749 checklistsAug 1-7: 1.3% of 22899 checklistsAug 8-14: 2.0% of 21972 checklistsAug 15-21: 2.3% of 22215 checklistsAug 22-31: 2.2% of 35087 checklistsSep 1-7: 1.9% of 29148 checklistsSep 8-14: 2.1% of 28042 checklistsSep 15-21: 1.4% of 26751 checklistsSep 22-30: 1.7% of 32398 checklistsOct 1-7: 1.7% of 26209 checklistsOct 8-14: 2.1% of 26809 checklistsOct 15-21: 4.5% of 23504 checklistsOct 22-31: 8.0% of 33269 checklistsNov 1-7: 12% of 25563 checklistsNov 8-14: 13% of 23810 checklistsNov 15-21: 12% of 22127 checklistsNov 22-30: 9.7% of 29449 checklistsDec 1-7: 7.7% of 22370 checklistsDec 8-14: 5.8% of 21581 checklistsDec 15-21: 3.3% of 24232 checklistsDec 22-31: 2.8% 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. Noble CountyBest the second week of November · 27 checklists that week, 1,516 in all42%
  2. Ashtabula CountyBest the second week of November · 159 checklists that week, 12,390 in all41%
  3. Paulding CountyBest the second week of November · 36 checklists that week, 1,653 in all35%
  4. Shelby CountyBest late November · 28 checklists that week, 1,659 in all34%
  5. Carroll CountyBest mid November · 31 checklists that week, 2,027 in all33%
  6. Auglaize CountyBest early April · 50 checklists that week, 2,068 in all32%

Best spots

Share of checklists at the peak
  1. Caesar Creek Recreation Area (northeast 2)Warren County, best early December · 20 checklists that week, 251 in all95%
  2. Pleasant Hill Lake (Switzer Creek)Richland County, best the second week of November · 28 checklists that week, 355 in all90%
  3. Caesar Creek Recreation Area (Buck Run)Clinton County, best early November · 21 checklists that week, 421 in all90%
  4. Dillon Recreation AreaMuskingum County, best the second week of November · 27 checklists that week, 733 in all88%
  5. Huron RangeErie County, best late April · 35 checklists that week, 944 in all87%
  6. East Fork State ParkClermont County, best early November · 139 checklists that week, 2,907 in all86%

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

Best time of day

In Ohio, the Bonaparte's Gull is most often listed on checklists started between 1 and 3 pm (3.6% of those checklists).

0%1%2%3%4%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: 2.2% of 43093 checklists7 am: 3.1% of 142017 checklists8 am: 3.1% of 205296 checklists9 am: 3.2% of 196322 checklists10 am: 3.3% of 170882 checklists11 am: 3.4% of 144567 checklists12 pm: 3.4% of 126551 checklists1 pm: 3.6% of 117855 checklists2 pm: 3.5% of 112869 checklists3 pm: 3.3% of 109786 checklists4 pm: 3.1% of 103116 checklists5 pm: 2.6% of 78409 checklists6 pm: 2.3% of 56785 checklists7 pm: 1.5% 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
January2.7%1.8%1.2%0.5%
February0.3%0.2%0.2%0.3%
March1.0%2.0%4.4%6.8%
April7.5%6.7%4.9%3.4%
May2.9%2.5%1.3%0.6%
June0.3%0.4%0.3%0.5%
July0.9%0.9%0.7%0.8%
August1.3%2.0%2.3%2.2%
September1.9%2.1%1.4%1.7%
October1.7%2.1%4.5%8.0%
November12%13%12%9.7%
December7.7%5.8%3.3%2.8%

Neighboring states

  • West Virginia: arrives the second week of March, 19 weeks earlier than Ohio
  • Indiana: arrives early October, 8 weeks later than Ohio
  • Michigan: arrives late July, 1 week earlier than Ohio
  • Kentucky: arrives late October, 11 weeks later than Ohio

Common questions

When do Bonaparte's Gulls arrive in Ohio?
Bonaparte's Gulls are winter birds in Ohio: they arrive in early August, peak in the second week of November (12% of checklists), and most are gone by mid January.
When do Bonaparte's Gulls leave Ohio?
Most Bonaparte's Gulls have left Ohio by mid January, when reports fall below half their usual rate.
When is the best time to see a Bonaparte's Gull in Ohio?
The Bonaparte's Gull is reported most often in the second week of November, on about 12% of Ohio checklists.
Where in Ohio are Bonaparte's Gulls seen most often?
By county, Noble County, Ashtabula County, and Paulding County have the highest peak reporting rates for the Bonaparte's Gull (counties with at least 200 checklists).