Bonaparte's Gull (Chroicocephalus philadelphia)
(c) Scott O'Donnell, some rights reserved (CC BY-NC), uploaded by Scott O'Donnell · CC BY-NC 4.0 (opens in a new tab) · iNaturalist (opens in a new tab)
BirdsIn Belmont County, Ohio

Bonaparte's Gull

Chroicocephalus philadelphia (Ord, 1815)

Bonaparte's Gull in all of Ohio
Kingdom
Animalia
Phylum
Chordata
Class
Aves
Family
Laridae
Near Belmont County

Range

Where it is recorded

Season shown in 0 of Ohio's 88 counties. Its mapped range covers 88. Explore Ohio

  • No result yet (0)
  • Within its mapped range (47)
  • Recorded, too few records for a result (35)
  • Recorded, season not shown (6)
  • Season shown (0)
Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files, 1:500,000. Range: USGS Gap Analysis Project, Species Range Maps CONUS_2001 (2018). Show as a table
Counties as a table
Bonaparte's Gull by Ohio county: records and mapped range
CountyRecordsIn mapped range
Adams CountyNo qualifying records yetYes: winter, migration
Allen CountyRecorded, too few records for a resultYes: winter
Ashland CountyNo qualifying records yetYes: winter
Ashtabula CountyRecorded, too few records for a resultYes: winter
Athens CountyNo qualifying records yetYes: migration
Auglaize CountyRecorded, too few records for a resultYes: winter
Belmont CountyNo qualifying records yetYes: migration
Brown CountyNo qualifying records yetYes: winter, migration
Butler CountyNo qualifying records yetYes: winter
Carroll CountyRecorded, too few records for a resultYes: winter
Champaign CountyRecorded, too few records for a resultYes: winter
Clark CountyRecorded, too few records for a resultYes: winter
Clermont CountyRecorded, too few records for a resultYes: winter
Clinton CountyRecorded, too few records for a resultYes: winter
Columbiana CountyNo qualifying records yetYes: winter, migration
Coshocton CountyNo qualifying records yetYes: winter
Crawford CountyNo qualifying records yetYes: winter
Cuyahoga County95 · Recorded, season not shownYes: winter
Darke CountyRecorded, too few records for a resultYes: winter
Defiance CountyRecorded, too few records for a resultYes: winter
Delaware CountyRecorded, too few records for a resultYes: winter
Erie County36 · Recorded, season not shownYes: winter
Fairfield CountyRecorded, too few records for a resultYes: winter
Fayette CountyNo qualifying records yetYes: winter
Franklin CountyRecorded, too few records for a resultYes: winter
Fulton CountyNo qualifying records yetYes: winter
Gallia CountyNo qualifying records yetYes: migration
Geauga CountyRecorded, too few records for a resultYes: winter
Greene CountyRecorded, too few records for a resultYes: winter
Guernsey CountyNo qualifying records yetYes: winter, migration
Hamilton CountyRecorded, too few records for a resultYes: winter
Hancock CountyRecorded, too few records for a resultYes: winter
Hardin CountyNo qualifying records yetYes: winter
Harrison CountyNo qualifying records yetYes: winter, migration
Henry CountyNo qualifying records yetYes: winter
Highland CountyNo qualifying records yetYes: winter
Hocking CountyNo qualifying records yetYes: winter, migration
Holmes CountyNo qualifying records yetYes: winter
Huron CountyRecorded, too few records for a resultYes: winter
Jackson CountyNo qualifying records yetYes: migration
Jefferson CountyNo qualifying records yetYes: winter, migration
Knox CountyNo qualifying records yetYes: winter
Lake County26 · Recorded, season not shownYes: winter
Lawrence CountyNo qualifying records yetYes: migration
Licking CountyNo qualifying records yetYes: winter
Logan CountyRecorded, too few records for a resultYes: winter
Lorain County31 · Recorded, season not shownYes: winter
Lucas County54 · Recorded, season not shownYes: winter
Madison CountyNo qualifying records yetYes: winter
Mahoning CountyNo qualifying records yetYes: winter
Marion CountyNo qualifying records yetYes: winter
Medina CountyRecorded, too few records for a resultYes: winter
Meigs CountyNo qualifying records yetYes: migration
Mercer CountyRecorded, too few records for a resultYes: winter
Miami CountyNo qualifying records yetYes: winter
Monroe CountyNo qualifying records yetYes: migration
Montgomery CountyRecorded, too few records for a resultYes: winter
Morgan CountyRecorded, too few records for a resultYes: migration
Morrow CountyRecorded, too few records for a resultYes: winter
Muskingum CountyRecorded, too few records for a resultYes: winter, migration
Noble CountyNo qualifying records yetYes: migration
Ottawa County24 · Recorded, season not shownYes: winter
Paulding CountyNo qualifying records yetYes: winter
Perry CountyNo qualifying records yetYes: winter, migration
Pickaway CountyNo qualifying records yetYes: winter
Pike CountyNo qualifying records yetYes: migration
Portage CountyRecorded, too few records for a resultYes: winter
Preble CountyNo qualifying records yetYes: winter
Putnam CountyNo qualifying records yetYes: winter
Richland CountyRecorded, too few records for a resultYes: winter
Ross CountyNo qualifying records yetYes: winter, migration
Sandusky CountyRecorded, too few records for a resultYes: winter
Scioto CountyNo qualifying records yetYes: migration
Seneca CountyNo qualifying records yetYes: winter
Shelby CountyNo qualifying records yetYes: winter
Stark CountyRecorded, too few records for a resultYes: winter
Summit CountyRecorded, too few records for a resultYes: winter
Trumbull CountyRecorded, too few records for a resultYes: winter
Tuscarawas CountyRecorded, too few records for a resultYes: winter
Union CountyRecorded, too few records for a resultYes: winter
Van Wert CountyNo qualifying records yetYes: winter
Vinton CountyNo qualifying records yetYes: migration
Warren CountyRecorded, too few records for a resultYes: winter
Washington CountyNo qualifying records yetYes: migration
Wayne CountyNo qualifying records yetYes: winter
Williams CountyNo qualifying records yetYes: winter
Wood CountyNo qualifying records yetYes: winter
Wyandot CountyRecorded, too few records for a resultYes: winter

Season

When it is recorded

In Belmont County

Not enough evidence

Not enough records in Belmont County yet to show a season. A season needs at least 20 records from 5 different years. Missing records do not mean it is absent.

In Ohio

Mid-March to mid-May, middle week mid-April

Recorded in two separate seasons, each shown with its own early, middle and late weeks. A later season is not shown: recorded in two separate seasons of its own.

Show over the bars
Recording in Ohio · records of all species each week, 1,691,199 in all

Records per week from 597 records in 10 of the 10 years from 2016 to 2025. Shows when people recorded it, not a season or how common it is.

Show as a table
Records of Bonaparte's Gull in Ohio each week, and records of all species
WeekRecords of Bonaparte's GullYears recordedRecords of all species
Jan 4–10226,211
Jan 11–17525,146
Jan 18–24004,645
Jan 25–31214,698
Feb 1–7006,023
Feb 8–14005,888
Feb 15–21005,436
Feb 22–28116,846
Mar 1–7008,321
Mar 8–145310,384
Mar 15–2124812,620
Mar 22–2814713,949
Mar 29 – Apr 421919,661
Apr 5–1134926,860
Apr 12–1863939,925
Apr 19–2544941,623
Apr 26 – May 219456,391
May 3–919952,952
May 10–1635953,785
May 17–2314257,698
May 24–307354,651
May 31 – Jun 60053,099
Jun 7–132253,700
Jun 14–202256,625
Jun 21–271155,361
Jun 28 – Jul 41158,477
Jul 5–113361,336
Jul 12–184264,722
Jul 19–252269,753
Jul 26 – Aug 12259,416
Aug 2–84359,712
Aug 9–151155,994
Aug 16–2216454,328
Aug 23–296551,772
Aug 30 – Sep 518557,167
Sep 6–1211459,075
Sep 13–1915354,543
Sep 20–269645,860
Sep 27 – Oct 34243,180
Oct 4–102237,841
Oct 11–175230,824
Oct 18–249521,156
Oct 25–316519,021
Nov 1–720814,172
Nov 8–1439812,621
Nov 15–212697,965
Nov 22–281578,136
Nov 29 – Dec 51896,083
Dec 6–122456,004
Dec 13–191435,423
Dec 20–26445,661
Dec 27 – Jan 2528,459

What these results show

These results show when people recorded a species, not when or where it occurs. Missing weeks and low counts do not mean absence or scarcity, and counts are not abundance. Contributed records reflect where, when and what people chose to observe.

Identification

How to identify it

Often confused with

  • Laughing Gull Leucophaeus atricilla98 identifications worldwide named one where the other was meant
  • Black-headed Gull Chroicocephalus ridibundus92 identifications worldwide named one where the other was meant
  • Franklin's Gull Leucophaeus pipixcan87 identifications worldwide named one where the other was meant
  • Little Gull Hydrocoloeus minutus57 identifications worldwide named one where the other was meant
  • Ring-billed Gull Larus delawarensis46 identifications worldwide named one where the other was meant

From iNaturalist’s similar-species counts, refreshed monthly: confusions in Ohio first, then worldwide. Only species with an Ohio result are listed.

Land cover where it is recorded

Land coverIts recordsAll Ohio records
Open water56%3%
Developed27%49%
Barren9%0.6%
Farmland4%11%
Wetland2%5%
Grassland and shrub1%0.9%
Forest0.5%31%

From 207 records placed within 100 m, beside all Ohio records placed the same way. People record where they go, so this shows where records come from, not where the species lives. Land cover: USGS Annual NLCD, 2025 (opens in a new tab)

Sources

Where these results come from

  • Records from iNaturalist research-grade observations and expert-identified GBIF datasets, CC0, CC BY and CC BY-NC. Sources
  • Seasons use the published method and its evidence thresholds. Methods
  • See it on iNaturalist (opens in a new tab)OpenPhenology is independent and not affiliated with iNaturalist.

Records behind the Ohio result

597 records from 2 datasets.

To cite: the GBIF download doi:10.15468/dl.y2jkt8 (opens in a new tab).

A spreadsheet (CSV) with a link to each record, on iNaturalist or GBIF. Records whose location was hidden by the observer or the source are counted but not linked.