MammalsIn Erie County, Ohio
Groundhog
Marmota (Marmota) monax (Linnaeus, 1758)
Groundhog in all of OhioRange
Where it is recorded
Season shown in 1 of Ohio's 88 counties. Its mapped range covers 88. Explore Ohio
- No result yet (0)
- Within its mapped range (10)
- Recorded, too few records for a result (57)
- Recorded, season not shown (20)
- Season shown (1)
Counties as a table
| County | Records | In mapped range |
|---|---|---|
| Adams County | Recorded, too few records for a result | Yes: year-round |
| Allen County | Recorded, too few records for a result | Yes: year-round |
| Ashland County | Recorded, too few records for a result | Yes: year-round |
| Ashtabula County | Recorded, too few records for a result | Yes: year-round |
| Athens County | 80 · Recorded, season not shown | Yes: year-round |
| Auglaize County | Recorded, too few records for a result | Yes: year-round |
| Belmont County | Recorded, too few records for a result | Yes: year-round |
| Brown County | Recorded, too few records for a result | Yes: year-round |
| Butler County | 35 · Recorded, season not shown | Yes: year-round |
| Carroll County | Recorded, too few records for a result | Yes: year-round |
| Champaign County | Recorded, too few records for a result | Yes: year-round |
| Clark County | Recorded, too few records for a result | Yes: year-round |
| Clermont County | Recorded, too few records for a result | Yes: year-round |
| Clinton County | No qualifying records yet | Yes: year-round |
| Columbiana County | Recorded, too few records for a result | Yes: year-round |
| Coshocton County | Recorded, too few records for a result | Yes: year-round |
| Crawford County | Recorded, too few records for a result | Yes: year-round |
| Cuyahoga County | 217 · Season shown | Yes: year-round |
| Darke County | Recorded, too few records for a result | Yes: year-round |
| Defiance County | Recorded, too few records for a result | Yes: year-round |
| Delaware County | 24 · Recorded, season not shown | Yes: year-round |
| Erie County | 62 · Recorded, season not shown | Yes: year-round |
| Fairfield County | Recorded, too few records for a result | Yes: year-round |
| Fayette County | Recorded, too few records for a result | Yes: year-round |
| Franklin County | 130 · Recorded, season not shown | Yes: year-round |
| Fulton County | Recorded, too few records for a result | Yes: year-round |
| Gallia County | Recorded, too few records for a result | Yes: year-round |
| Geauga County | Recorded, too few records for a result | Yes: year-round |
| Greene County | 25 · Recorded, season not shown | Yes: year-round |
| Guernsey County | Recorded, too few records for a result | Yes: year-round |
| Hamilton County | 71 · Recorded, season not shown | Yes: year-round |
| Hancock County | Recorded, too few records for a result | Yes: year-round |
| Hardin County | Recorded, too few records for a result | Yes: year-round |
| Harrison County | Recorded, too few records for a result | Yes: year-round |
| Henry County | Recorded, too few records for a result | Yes: year-round |
| Highland County | Recorded, too few records for a result | Yes: year-round |
| Hocking County | Recorded, too few records for a result | Yes: year-round |
| Holmes County | Recorded, too few records for a result | Yes: year-round |
| Huron County | No qualifying records yet | Yes: year-round |
| Jackson County | No qualifying records yet | Yes: year-round |
| Jefferson County | Recorded, too few records for a result | Yes: year-round |
| Knox County | 21 · Recorded, season not shown | Yes: year-round |
| Lake County | 39 · Recorded, season not shown | Yes: year-round |
| Lawrence County | Recorded, too few records for a result | Yes: year-round |
| Licking County | 24 · Recorded, season not shown | Yes: year-round |
| Logan County | 50 · Recorded, season not shown | Yes: year-round |
| Lorain County | 30 · Recorded, season not shown | Yes: year-round |
| Lucas County | 117 · Recorded, season not shown | Yes: year-round |
| Madison County | Recorded, too few records for a result | Yes: year-round |
| Mahoning County | Recorded, too few records for a result | Yes: year-round |
| Marion County | Recorded, too few records for a result | Yes: year-round |
| Medina County | 22 · Recorded, season not shown | Yes: year-round |
| Meigs County | Recorded, too few records for a result | Yes: year-round |
| Mercer County | Recorded, too few records for a result | Yes: year-round |
| Miami County | Recorded, too few records for a result | Yes: year-round |
| Monroe County | Recorded, too few records for a result | Yes: year-round |
| Montgomery County | 39 · Recorded, season not shown | Yes: year-round |
| Morgan County | No qualifying records yet | Yes: year-round |
| Morrow County | Recorded, too few records for a result | Yes: year-round |
| Muskingum County | Recorded, too few records for a result | Yes: year-round |
| Noble County | No qualifying records yet | Yes: year-round |
| Ottawa County | 23 · Recorded, season not shown | Yes: year-round |
| Paulding County | No qualifying records yet | Yes: year-round |
| Perry County | No qualifying records yet | Yes: year-round |
| Pickaway County | Recorded, too few records for a result | Yes: year-round |
| Pike County | No qualifying records yet | Yes: year-round |
| Portage County | 67 · Recorded, season not shown | Yes: year-round |
| Preble County | Recorded, too few records for a result | Yes: year-round |
| Putnam County | Recorded, too few records for a result | Yes: year-round |
| Richland County | Recorded, too few records for a result | Yes: year-round |
| Ross County | Recorded, too few records for a result | Yes: year-round |
| Sandusky County | No qualifying records yet | Yes: year-round |
| Scioto County | Recorded, too few records for a result | Yes: year-round |
| Seneca County | Recorded, too few records for a result | Yes: year-round |
| Shelby County | Recorded, too few records for a result | Yes: year-round |
| Stark County | 72 · Recorded, season not shown | Yes: year-round |
| Summit County | 160 · Recorded, season not shown | Yes: year-round |
| Trumbull County | Recorded, too few records for a result | Yes: year-round |
| Tuscarawas County | Recorded, too few records for a result | Yes: year-round |
| Union County | Recorded, too few records for a result | Yes: year-round |
| Van Wert County | Recorded, too few records for a result | Yes: year-round |
| Vinton County | No qualifying records yet | Yes: year-round |
| Warren County | Recorded, too few records for a result | Yes: year-round |
| Washington County | Recorded, too few records for a result | Yes: year-round |
| Wayne County | 23 · Recorded, season not shown | Yes: year-round |
| Williams County | Recorded, too few records for a result | Yes: year-round |
| Wood County | Recorded, too few records for a result | Yes: year-round |
| Wyandot County | Recorded, too few records for a result | Yes: year-round |
Season
When it is recorded
In Erie County
Not enough evidence
Most records come from a single year, so a season is not shown yet. Based on 62 records in 9 of the 10 years from 2016 to 2025, above the minimum of 20 records from 5 different years.
Show over the bars
Records per week from 62 records in 9 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
| Week | Records of Groundhog | Years recorded | Records of all species |
|---|---|---|---|
| Jan 4–10 | 0 | 0 | 47 |
| Jan 11–17 | 0 | 0 | 75 |
| Jan 18–24 | 0 | 0 | 52 |
| Jan 25–31 | 0 | 0 | 67 |
| Feb 1–7 | 0 | 0 | 70 |
| Feb 8–14 | 0 | 0 | 21 |
| Feb 15–21 | 0 | 0 | 52 |
| Feb 22–28 | 0 | 0 | 60 |
| Mar 1–7 | 0 | 0 | 90 |
| Mar 8–14 | 0 | 0 | 90 |
| Mar 15–21 | 0 | 0 | 79 |
| Mar 22–28 | 0 | 0 | 93 |
| Mar 29 – Apr 4 | 1 | 1 | 82 |
| Apr 5–11 | 2 | 2 | 499 |
| Apr 12–18 | 0 | 0 | 555 |
| Apr 19–25 | 2 | 2 | 531 |
| Apr 26 – May 2 | 4 | 4 | 590 |
| May 3–9 | 1 | 1 | 519 |
| May 10–16 | 6 | 4 | 765 |
| May 17–23 | 5 | 5 | 697 |
| May 24–30 | 20 | 3 | 548 |
| May 31 – Jun 6 | 6 | 2 | 427 |
| Jun 7–13 | 2 | 2 | 381 |
| Jun 14–20 | 1 | 1 | 384 |
| Jun 21–27 | 1 | 1 | 273 |
| Jun 28 – Jul 4 | 2 | 2 | 316 |
| Jul 5–11 | 0 | 0 | 605 |
| Jul 12–18 | 1 | 1 | 329 |
| Jul 19–25 | 0 | 0 | 514 |
| Jul 26 – Aug 1 | 1 | 1 | 527 |
| Aug 2–8 | 0 | 0 | 409 |
| Aug 9–15 | 0 | 0 | 422 |
| Aug 16–22 | 1 | 1 | 699 |
| Aug 23–29 | 2 | 2 | 309 |
| Aug 30 – Sep 5 | 0 | 0 | 440 |
| Sep 6–12 | 0 | 0 | 392 |
| Sep 13–19 | 0 | 0 | 444 |
| Sep 20–26 | 0 | 0 | 398 |
| Sep 27 – Oct 3 | 0 | 0 | 248 |
| Oct 4–10 | 1 | 1 | 260 |
| Oct 11–17 | 2 | 2 | 148 |
| Oct 18–24 | 0 | 0 | 176 |
| Oct 25–31 | 0 | 0 | 161 |
| Nov 1–7 | 1 | 1 | 149 |
| Nov 8–14 | 0 | 0 | 78 |
| Nov 15–21 | 0 | 0 | 49 |
| Nov 22–28 | 0 | 0 | 72 |
| Nov 29 – Dec 5 | 0 | 0 | 71 |
| Dec 6–12 | 0 | 0 | 27 |
| Dec 13–19 | 0 | 0 | 29 |
| Dec 20–26 | 0 | 0 | 54 |
| Dec 27 – Jan 2 | 0 | 0 | 61 |
In Ohio
Late March to mid-October, middle week Jun 28 – Jul 4
Middle week · Jun 28 – Jul 4
This week · Nov 8–14
Show over the bars
Records per week from 2,227 records in 10 of the 10 years from 2016 to 2025. Shows when people recorded it, not how common it is. The grey bars show how many records of all species were made here each week, so you can see when recording itself was high or low; the season is not adjusted by them.
Recorded on 1,223 dates. Latest record: December 2025.
Show as a table
| Week | Records of Groundhog | Years recorded | Records of all species |
|---|---|---|---|
| Jan 4–10 | 1 | 1 | 6,211 |
| Jan 11–17 | 0 | 0 | 5,146 |
| Jan 18–24 | 0 | 0 | 4,645 |
| Jan 25–31 | 1 | 1 | 4,698 |
| Feb 1–7 | 1 | 1 | 6,023 |
| Feb 8–14 | 2 | 2 | 5,888 |
| Feb 15–21 | 2 | 2 | 5,436 |
| Feb 22–28 | 5 | 3 | 6,846 |
| Mar 1–7 | 11 | 5 | 8,321 |
| Mar 8–14 | 18 | 7 | 10,384 |
| Mar 15–21 | 19 | 5 | 12,620 |
| Mar 22–28 | 35 | 7 | 13,949 |
| Mar 29 – Apr 4 | 34 | 8 | 19,661 |
| Apr 5–11 | 52 | 9 | 26,860 |
| Apr 12–18 | 69 | 8 | 39,925 |
| Apr 19–25 | 57 | 9 | 41,623 |
| Apr 26 – May 2 | 95 | 10 | 56,391 |
| May 3–9 | 84 | 9 | 52,952 |
| May 10–16 | 94 | 10 | 53,785 |
| May 17–23 | 76 | 10 | 57,698 |
| May 24–30 | 90 | 9 | 54,651 |
| May 31 – Jun 6 | 71 | 9 | 53,099 |
| Jun 7–13 | 88 | 9 | 53,700 |
| Jun 14–20 | 71 | 10 | 56,625 |
| Jun 21–27 | 75 | 8 | 55,361 |
| Jun 28 – Jul 4 | 77 | 10 | 58,477 |
| Jul 5–11 | 83 | 9 | 61,336 |
| Jul 12–18 | 79 | 10 | 64,722 |
| Jul 19–25 | 79 | 9 | 69,753 |
| Jul 26 – Aug 1 | 65 | 8 | 59,416 |
| Aug 2–8 | 71 | 10 | 59,712 |
| Aug 9–15 | 51 | 8 | 55,994 |
| Aug 16–22 | 65 | 9 | 54,328 |
| Aug 23–29 | 56 | 9 | 51,772 |
| Aug 30 – Sep 5 | 55 | 9 | 57,167 |
| Sep 6–12 | 69 | 9 | 59,075 |
| Sep 13–19 | 63 | 9 | 54,543 |
| Sep 20–26 | 69 | 6 | 45,860 |
| Sep 27 – Oct 3 | 47 | 8 | 43,180 |
| Oct 4–10 | 65 | 10 | 37,841 |
| Oct 11–17 | 57 | 8 | 30,824 |
| Oct 18–24 | 36 | 10 | 21,156 |
| Oct 25–31 | 24 | 8 | 19,021 |
| Nov 1–7 | 27 | 8 | 14,172 |
| Nov 8–14 | 20 | 7 | 12,621 |
| Nov 15–21 | 4 | 2 | 7,965 |
| Nov 22–28 | 3 | 2 | 8,136 |
| Nov 29 – Dec 5 | 4 | 4 | 6,083 |
| Dec 6–12 | 3 | 3 | 6,004 |
| Dec 13–19 | 3 | 2 | 5,423 |
| Dec 20–26 | 1 | 1 | 5,661 |
| Dec 27 – Jan 2 | 0 | 0 | 8,459 |
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
Look-alikes
Land cover
Often confused with
- Muskrat Ondatra zibethicus111 identifications worldwide named one where the other was meant
- American Beaver Castor canadensis79 identifications worldwide named one where the other was meant
- Common Raccoon Procyon lotor40 identifications worldwide named one where the other was meant
- Eastern Gray Squirrel Sciurus (Sciurus) carolinensis24 identifications worldwide named one where the other was meant
- Virginia Opossum Didelphis virginiana18 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 cover | Its recordsAll Ohio records |
|---|---|
| Developed | 74%49% |
| Forest | 12%31% |
| Farmland | 9%11% |
| Wetland | 4%5% |
| Open water | 1%3% |
| Barren | 0.4%0.6% |
| Grassland and shrub | 0.3%0.9% |
From 1,236 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
2,227 records from 3 datasets.
- iNaturalist Research-grade Observations (opens in a new tab) · iNaturalist.org · 2,210 recordsiNaturalist contributors, iNaturalist (2026). iNaturalist Research-grade Observations. iNaturalist.org. Occurrence dataset https://doi.org/10.15468/ab3s5x accessed via GBIF.org on 2026-11-13.
- iNaturalist observations (opens in a new tab) · iNaturalist.org · 16 recordsiNaturalist. Available from https://www.inaturalist.org. Accessed 2026-11-13
- Roadkill (opens in a new tab) · University of Natural Resources and Life Sciences, Vienna · 1 recordUniversity of Natural Resources and Life Sciences, Vienna (2024). Roadkill. Occurrence dataset https://doi.org/10.15468/ejb47y accessed via GBIF.org on 2026-11-13.
To cite: the GBIF downloads doi:10.15468/dl.8m7c3d (opens in a new tab), 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.