BirdsIn Summit County, Ohio
Red-breasted Merganser
Mergus serrator Linnaeus, 1758
Red-breasted Merganser in all of Ohio- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Aves
- Order
- Anseriformes
- Family
- Anatidae
- Genus
- Mergus
Near Summit 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 (44)
- Recorded, too few records for a result (39)
- Recorded, season not shown (5)
- Season shown (0)
Counties as a table
| County | Records | In mapped range |
|---|---|---|
| Adams County | No qualifying records yet | Yes: migration |
| Allen County | Recorded, too few records for a result | Yes: migration |
| Ashland County | Recorded, too few records for a result | Yes: migration |
| Ashtabula County | Recorded, too few records for a result | Yes: migration |
| Athens County | Recorded, too few records for a result | Yes: migration |
| Auglaize County | Recorded, too few records for a result | Yes: migration |
| Belmont County | No qualifying records yet | Yes: migration |
| Brown County | No qualifying records yet | Yes: migration |
| Butler County | Recorded, too few records for a result | Yes: migration |
| Carroll County | No qualifying records yet | Yes: migration |
| Champaign County | Recorded, too few records for a result | Yes: migration |
| Clark County | Recorded, too few records for a result | Yes: migration |
| Clermont County | Recorded, too few records for a result | Yes: migration |
| Clinton County | No qualifying records yet | Yes: migration |
| Columbiana County | Recorded, too few records for a result | Yes: migration |
| Coshocton County | No qualifying records yet | Yes: migration |
| Crawford County | No qualifying records yet | Yes: migration |
| Cuyahoga County | 272 · Recorded, season not shown | Yes: migration |
| Darke County | Recorded, too few records for a result | Yes: migration |
| Defiance County | No qualifying records yet | Yes: migration |
| Delaware County | Recorded, too few records for a result | Yes: migration |
| Erie County | 28 · Recorded, season not shown | Yes: migration |
| Fairfield County | No qualifying records yet | Yes: migration |
| Fayette County | No qualifying records yet | Yes: migration |
| Franklin County | Recorded, too few records for a result | Yes: migration |
| Fulton County | No qualifying records yet | Yes: migration |
| Gallia County | No qualifying records yet | Yes: migration |
| Geauga County | Recorded, too few records for a result | Yes: migration |
| Greene County | Recorded, too few records for a result | Yes: migration |
| Guernsey County | No qualifying records yet | Yes: migration |
| Hamilton County | Recorded, too few records for a result | Yes: migration |
| Hancock County | Recorded, too few records for a result | Yes: migration |
| Hardin County | No qualifying records yet | Yes: migration |
| Harrison County | Recorded, too few records for a result | Yes: migration |
| Henry County | Recorded, too few records for a result | Yes: migration |
| Highland County | Recorded, too few records for a result | Yes: migration |
| Hocking County | Recorded, too few records for a result | Yes: migration |
| Holmes County | No qualifying records yet | Yes: migration |
| Huron County | No qualifying records yet | Yes: migration |
| Jackson County | No qualifying records yet | Yes: migration |
| Jefferson County | No qualifying records yet | Yes: migration |
| Knox County | No qualifying records yet | Yes: migration |
| Lake County | 44 · Recorded, season not shown | Yes: migration |
| Lawrence County | No qualifying records yet | Yes: migration |
| Licking County | No qualifying records yet | Yes: migration |
| Logan County | Recorded, too few records for a result | Yes: migration |
| Lorain County | 51 · Recorded, season not shown | Yes: migration |
| Lucas County | Recorded, too few records for a result | Yes: migration |
| Madison County | No qualifying records yet | Yes: migration |
| Mahoning County | No qualifying records yet | Yes: migration |
| Marion County | No qualifying records yet | Yes: migration |
| Medina County | Recorded, too few records for a result | Yes: migration |
| Meigs County | No qualifying records yet | Yes: migration |
| Mercer County | Recorded, too few records for a result | Yes: migration |
| Miami County | No qualifying records yet | Yes: migration |
| Monroe County | No qualifying records yet | Yes: migration |
| Montgomery County | Recorded, too few records for a result | Yes: migration |
| Morgan County | No qualifying records yet | Yes: migration |
| Morrow County | Recorded, too few records for a result | Yes: migration |
| Muskingum County | No qualifying records yet | Yes: migration |
| Noble County | No qualifying records yet | Yes: migration |
| Ottawa County | Recorded, too few records for a result | Yes: migration |
| Paulding County | Recorded, too few records for a result | Yes: migration |
| Perry County | Recorded, too few records for a result | Yes: migration |
| Pickaway County | No qualifying records yet | Yes: migration |
| Pike County | No qualifying records yet | Yes: migration |
| Portage County | Recorded, too few records for a result | Yes: migration |
| Preble County | Recorded, too few records for a result | Yes: migration |
| Putnam County | No qualifying records yet | Yes: migration |
| Richland County | Recorded, too few records for a result | Yes: migration |
| Ross County | No qualifying records yet | Yes: migration |
| Sandusky County | No qualifying records yet | Yes: migration |
| Scioto County | No qualifying records yet | Yes: migration |
| Seneca County | No qualifying records yet | Yes: migration |
| Shelby County | No qualifying records yet | Yes: migration |
| Stark County | Recorded, too few records for a result | Yes: migration |
| Summit County | 49 · Recorded, season not shown | Yes: migration |
| Trumbull County | Recorded, too few records for a result | Yes: migration |
| Tuscarawas County | No qualifying records yet | Yes: migration |
| Union County | No qualifying records yet | Yes: migration |
| Van Wert County | No qualifying records yet | Yes: migration |
| Vinton County | No qualifying records yet | Yes: migration |
| Warren County | Recorded, too few records for a result | Yes: migration |
| Washington County | Recorded, too few records for a result | Yes: migration |
| Wayne County | Recorded, too few records for a result | Yes: migration |
| Williams County | No qualifying records yet | Yes: migration |
| Wood County | No qualifying records yet | Yes: migration |
| Wyandot County | Recorded, too few records for a result | Yes: migration |
Season
When it is recorded
In Summit County
Not enough evidence
The weeks are still too uncertain to show a season. Based on 49 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 49 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 Red-breasted Merganser | Years recorded | Records of all species |
|---|---|---|---|
| Jan 4–10 | 0 | 0 | 711 |
| Jan 11–17 | 0 | 0 | 665 |
| Jan 18–24 | 0 | 0 | 601 |
| Jan 25–31 | 0 | 0 | 526 |
| Feb 1–7 | 0 | 0 | 608 |
| Feb 8–14 | 2 | 1 | 619 |
| Feb 15–21 | 3 | 1 | 629 |
| Feb 22–28 | 0 | 0 | 748 |
| Mar 1–7 | 0 | 0 | 728 |
| Mar 8–14 | 1 | 1 | 852 |
| Mar 15–21 | 3 | 3 | 1,055 |
| Mar 22–28 | 7 | 6 | 1,007 |
| Mar 29 – Apr 4 | 4 | 3 | 1,005 |
| Apr 5–11 | 8 | 6 | 1,654 |
| Apr 12–18 | 8 | 5 | 2,454 |
| Apr 19–25 | 4 | 4 | 2,699 |
| Apr 26 – May 2 | 5 | 3 | 3,970 |
| May 3–9 | 3 | 2 | 3,569 |
| May 10–16 | 0 | 0 | 4,053 |
| May 17–23 | 0 | 0 | 3,509 |
| May 24–30 | 0 | 0 | 4,045 |
| May 31 – Jun 6 | 0 | 0 | 2,874 |
| Jun 7–13 | 0 | 0 | 3,158 |
| Jun 14–20 | 0 | 0 | 3,796 |
| Jun 21–27 | 0 | 0 | 3,501 |
| Jun 28 – Jul 4 | 0 | 0 | 3,968 |
| Jul 5–11 | 0 | 0 | 3,632 |
| Jul 12–18 | 0 | 0 | 4,051 |
| Jul 19–25 | 0 | 0 | 3,855 |
| Jul 26 – Aug 1 | 0 | 0 | 2,908 |
| Aug 2–8 | 0 | 0 | 3,828 |
| Aug 9–15 | 0 | 0 | 3,583 |
| Aug 16–22 | 0 | 0 | 3,535 |
| Aug 23–29 | 0 | 0 | 2,939 |
| Aug 30 – Sep 5 | 0 | 0 | 2,840 |
| Sep 6–12 | 0 | 0 | 2,758 |
| Sep 13–19 | 0 | 0 | 2,761 |
| Sep 20–26 | 0 | 0 | 2,646 |
| Sep 27 – Oct 3 | 0 | 0 | 2,089 |
| Oct 4–10 | 0 | 0 | 2,317 |
| Oct 11–17 | 0 | 0 | 1,944 |
| Oct 18–24 | 1 | 1 | 1,314 |
| Oct 25–31 | 0 | 0 | 1,272 |
| Nov 1–7 | 0 | 0 | 786 |
| Nov 8–14 | 0 | 0 | 761 |
| Nov 15–21 | 0 | 0 | 654 |
| Nov 22–28 | 0 | 0 | 703 |
| Nov 29 – Dec 5 | 0 | 0 | 503 |
| Dec 6–12 | 0 | 0 | 447 |
| Dec 13–19 | 0 | 0 | 496 |
| Dec 20–26 | 0 | 0 | 522 |
| Dec 27 – Jan 2 | 0 | 0 | 728 |
In Ohio
Late November to early May, middle week Mar 22–28
Middle week · Mar 22–28
This week · Nov 8–14
Show over the bars
Records per week from 842 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 425 dates. Latest record: December 2025.
Show as a table
| Week | Records of Red-breasted Merganser | Years recorded | Records of all species |
|---|---|---|---|
| Jan 4–10 | 21 | 9 | 6,211 |
| Jan 11–17 | 21 | 4 | 5,146 |
| Jan 18–24 | 18 | 5 | 4,645 |
| Jan 25–31 | 11 | 3 | 4,698 |
| Feb 1–7 | 16 | 6 | 6,023 |
| Feb 8–14 | 20 | 5 | 5,888 |
| Feb 15–21 | 8 | 3 | 5,436 |
| Feb 22–28 | 22 | 6 | 6,846 |
| Mar 1–7 | 8 | 3 | 8,321 |
| Mar 8–14 | 28 | 7 | 10,384 |
| Mar 15–21 | 43 | 9 | 12,620 |
| Mar 22–28 | 50 | 10 | 13,949 |
| Mar 29 – Apr 4 | 73 | 10 | 19,661 |
| Apr 5–11 | 85 | 10 | 26,860 |
| Apr 12–18 | 112 | 10 | 39,925 |
| Apr 19–25 | 59 | 9 | 41,623 |
| Apr 26 – May 2 | 43 | 10 | 56,391 |
| May 3–9 | 19 | 5 | 52,952 |
| May 10–16 | 8 | 6 | 53,785 |
| May 17–23 | 8 | 4 | 57,698 |
| May 24–30 | 4 | 3 | 54,651 |
| May 31 – Jun 6 | 2 | 2 | 53,099 |
| Jun 7–13 | 1 | 1 | 53,700 |
| Jun 14–20 | 0 | 0 | 56,625 |
| Jun 21–27 | 0 | 0 | 55,361 |
| Jun 28 – Jul 4 | 0 | 0 | 58,477 |
| Jul 5–11 | 1 | 1 | 61,336 |
| Jul 12–18 | 0 | 0 | 64,722 |
| Jul 19–25 | 1 | 1 | 69,753 |
| Jul 26 – Aug 1 | 0 | 0 | 59,416 |
| Aug 2–8 | 1 | 1 | 59,712 |
| Aug 9–15 | 0 | 0 | 55,994 |
| Aug 16–22 | 0 | 0 | 54,328 |
| Aug 23–29 | 0 | 0 | 51,772 |
| Aug 30 – Sep 5 | 0 | 0 | 57,167 |
| Sep 6–12 | 0 | 0 | 59,075 |
| Sep 13–19 | 1 | 1 | 54,543 |
| Sep 20–26 | 0 | 0 | 45,860 |
| Sep 27 – Oct 3 | 0 | 0 | 43,180 |
| Oct 4–10 | 0 | 0 | 37,841 |
| Oct 11–17 | 0 | 0 | 30,824 |
| Oct 18–24 | 3 | 1 | 21,156 |
| Oct 25–31 | 2 | 2 | 19,021 |
| Nov 1–7 | 2 | 2 | 14,172 |
| Nov 8–14 | 8 | 4 | 12,621 |
| Nov 15–21 | 9 | 5 | 7,965 |
| Nov 22–28 | 7 | 5 | 8,136 |
| Nov 29 – Dec 5 | 11 | 7 | 6,083 |
| Dec 6–12 | 20 | 5 | 6,004 |
| Dec 13–19 | 16 | 6 | 5,423 |
| Dec 20–26 | 39 | 8 | 5,661 |
| Dec 27 – Jan 2 | 41 | 8 | 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
- Common Merganser Mergus merganserOften confused in Ohio: 16 identifications in Ohio named one where the other was meant
- Mallard Anas platyrhynchosOften confused in Ohio: 11 identifications in Ohio named one where the other was meant
- Hooded Merganser Lophodytes cucullatus175 identifications worldwide named one where the other was meant
- Common Loon Gavia immer25 identifications worldwide named one where the other was meant
- Common Goldeneye Bucephala clangula19 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 |
|---|---|
| Open water | 67%3% |
| Developed | 25%49% |
| Forest | 3%31% |
| Farmland | 2%11% |
| Grassland and shrub | 1%0.9% |
| Wetland | 0.7%5% |
| Barren | 0.3%0.6% |
From 298 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
842 records from 2 datasets.
- iNaturalist Research-grade Observations (opens in a new tab) · iNaturalist.org · 834 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 · 8 recordsiNaturalist. Available from https://www.inaturalist.org. Accessed 2026-11-13
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.