- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Aves
- Order
- Anseriformes
- Family
- Anatidae
- Genus
- Aythya
Conservation status
Of special interest in Ohio (Ohio Division of Wildlife, June 2026)
Ohio's Division of Wildlife names it as one at the edge of its range in Ohio, breeding here at low numbers. It is not listed as endangered or threatened.
Near Hamilton County
Range
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 (42)
- Recorded, too few records for a result (40)
- Recorded, season not shown (5)
- Season shown (1)
Counties as a table
| County | Records | In mapped range |
|---|---|---|
| Adams County | Recorded, too few records for a result | Yes: winter, migration |
| Allen County | Recorded, too few records for a result | Yes: year-round |
| Ashland County | No qualifying records yet | Yes: year-round |
| Ashtabula County | No qualifying records yet | Yes: year-round |
| Athens County | Recorded, too few records for a result | Yes: migration |
| Auglaize County | Recorded, too few records for a result | Yes: year-round |
| Belmont County | No qualifying records yet | Yes: migration |
| Brown County | No qualifying records yet | Yes: winter |
| Butler County | Recorded, too few records for a result | Yes: winter |
| Carroll County | No qualifying records yet | Yes: winter, migration |
| Champaign County | Recorded, too few records for a result | Yes: year-round, winter |
| Clark County | Recorded, too few records for a result | Yes: winter |
| Clermont County | Recorded, too few records for a result | Yes: winter |
| Clinton County | Recorded, too few records for a result | Yes: winter |
| Columbiana County | No qualifying records yet | Yes: year-round, winter, migration |
| Coshocton County | Recorded, too few records for a result | Yes: winter, migration |
| Crawford County | No qualifying records yet | Yes: year-round |
| Cuyahoga County | 49 · Recorded, season not shown | Yes: year-round |
| Darke County | Recorded, too few records for a result | Yes: year-round, winter |
| Defiance County | No qualifying records yet | Yes: year-round |
| Delaware County | Recorded, too few records for a result | Yes: year-round, winter |
| Erie County | Recorded, too few records for a result | Yes: year-round |
| Fairfield County | No qualifying records yet | Yes: winter, migration |
| Fayette County | No qualifying records yet | Yes: winter |
| Franklin County | 23 · Season shown | Yes: winter |
| Fulton County | No qualifying records yet | Yes: year-round |
| Gallia County | No qualifying records yet | Yes: migration |
| Geauga County | Recorded, too few records for a result | Yes: year-round |
| Greene County | Recorded, too few records for a result | Yes: winter |
| Guernsey County | No qualifying records yet | Yes: migration |
| Hamilton County | 64 · Recorded, season not shown | Yes: winter |
| Hancock County | Recorded, too few records for a result | Yes: year-round |
| Hardin County | No qualifying records yet | Yes: year-round |
| Harrison County | No qualifying records yet | Yes: migration |
| Henry County | No qualifying records yet | Yes: year-round |
| Highland County | Recorded, too few records for a result | Yes: winter |
| Hocking County | Recorded, too few records for a result | Yes: winter, migration |
| Holmes County | Recorded, too few records for a result | Yes: year-round, winter |
| Huron County | Recorded, too few records for a result | Yes: year-round |
| Jackson County | No qualifying records yet | Yes: migration |
| Jefferson County | No qualifying records yet | Yes: migration |
| Knox County | Recorded, too few records for a result | Yes: year-round, winter |
| Lake County | Recorded, too few records for a result | Yes: year-round |
| Lawrence County | No qualifying records yet | Yes: migration |
| Licking County | No qualifying records yet | Yes: year-round, winter |
| Logan County | Recorded, too few records for a result | Yes: year-round |
| Lorain County | 34 · Recorded, season not shown | Yes: year-round |
| Lucas County | 25 · Recorded, season not shown | Yes: year-round |
| Madison County | No qualifying records yet | Yes: winter |
| Mahoning County | Recorded, too few records for a result | Yes: year-round, migration |
| Marion County | Recorded, too few records for a result | Yes: year-round |
| Medina County | Recorded, too few records for a result | Yes: year-round |
| Meigs County | No qualifying records yet | Yes: migration |
| Mercer County | Recorded, too few records for a result | Yes: year-round |
| Miami County | No qualifying records yet | Yes: year-round, winter |
| Monroe County | No qualifying records yet | Yes: migration |
| Montgomery County | Recorded, too few records for a result | Yes: winter |
| Morgan County | No qualifying records yet | Yes: migration |
| Morrow County | No qualifying records yet | Yes: year-round |
| Muskingum County | Recorded, too few records for a result | Yes: winter, migration |
| Noble County | No qualifying records yet | Yes: migration |
| Ottawa County | Recorded, too few records for a result | Yes: year-round |
| Paulding County | No qualifying records yet | Yes: year-round |
| Perry County | No qualifying records yet | Yes: winter, migration |
| Pickaway County | No qualifying records yet | Yes: winter |
| Pike County | No qualifying records yet | Yes: winter, migration |
| Portage County | Recorded, too few records for a result | Yes: year-round |
| Preble County | No qualifying records yet | Yes: winter |
| Putnam County | No qualifying records yet | Yes: year-round |
| Richland County | Recorded, too few records for a result | Yes: year-round |
| Ross County | No qualifying records yet | Yes: winter, migration |
| Sandusky County | No qualifying records yet | Yes: year-round |
| Scioto County | No qualifying records yet | Yes: winter, migration |
| Seneca County | No qualifying records yet | Yes: year-round |
| Shelby County | No qualifying records yet | Yes: year-round |
| Stark County | Recorded, too few records for a result | Yes: year-round, winter |
| Summit County | 96 · Recorded, season not shown | Yes: year-round |
| Trumbull County | Recorded, too few records for a result | Yes: year-round |
| Tuscarawas County | No qualifying records yet | Yes: winter, migration |
| Union County | Recorded, too few records for a result | Yes: year-round, winter |
| Van Wert County | No qualifying records yet | Yes: year-round |
| Vinton County | No qualifying records yet | Yes: migration |
| Warren County | Recorded, too few records for a result | Yes: winter |
| Washington County | Recorded, too few records for a result | Yes: migration |
| Wayne County | Recorded, too few records for a result | Yes: year-round |
| Williams County | No qualifying records yet | 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 Hamilton County
Not enough evidence
Recorded in two separate seasons, so one season would put its middle week in the gap. Based on 64 records in 8 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 64 records in 8 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 Redhead | Years recorded | Records of all species |
|---|---|---|---|
| Jan 4–10 | 2 | 2 | 392 |
| Jan 11–17 | 4 | 2 | 344 |
| Jan 18–24 | 1 | 1 | 312 |
| Jan 25–31 | 1 | 1 | 206 |
| Feb 1–7 | 7 | 4 | 357 |
| Feb 8–14 | 6 | 2 | 383 |
| Feb 15–21 | 10 | 3 | 366 |
| Feb 22–28 | 7 | 3 | 391 |
| Mar 1–7 | 3 | 3 | 551 |
| Mar 8–14 | 1 | 1 | 523 |
| Mar 15–21 | 1 | 1 | 750 |
| Mar 22–28 | 0 | 0 | 1,012 |
| Mar 29 – Apr 4 | 0 | 0 | 1,535 |
| Apr 5–11 | 0 | 0 | 1,960 |
| Apr 12–18 | 0 | 0 | 2,492 |
| Apr 19–25 | 0 | 0 | 2,403 |
| Apr 26 – May 2 | 1 | 1 | 3,783 |
| May 3–9 | 2 | 2 | 3,307 |
| May 10–16 | 0 | 0 | 2,059 |
| May 17–23 | 0 | 0 | 2,153 |
| May 24–30 | 0 | 0 | 2,390 |
| May 31 – Jun 6 | 0 | 0 | 2,648 |
| Jun 7–13 | 0 | 0 | 2,715 |
| Jun 14–20 | 0 | 0 | 2,695 |
| Jun 21–27 | 0 | 0 | 2,714 |
| Jun 28 – Jul 4 | 0 | 0 | 3,220 |
| Jul 5–11 | 0 | 0 | 2,980 |
| Jul 12–18 | 0 | 0 | 3,031 |
| Jul 19–25 | 0 | 0 | 2,961 |
| Jul 26 – Aug 1 | 0 | 0 | 2,795 |
| Aug 2–8 | 0 | 0 | 2,884 |
| Aug 9–15 | 0 | 0 | 2,696 |
| Aug 16–22 | 0 | 0 | 2,535 |
| Aug 23–29 | 0 | 0 | 2,536 |
| Aug 30 – Sep 5 | 0 | 0 | 2,606 |
| Sep 6–12 | 0 | 0 | 2,980 |
| Sep 13–19 | 0 | 0 | 2,959 |
| Sep 20–26 | 0 | 0 | 2,313 |
| Sep 27 – Oct 3 | 0 | 0 | 2,122 |
| Oct 4–10 | 0 | 0 | 1,828 |
| Oct 11–17 | 0 | 0 | 1,793 |
| Oct 18–24 | 0 | 0 | 1,338 |
| Oct 25–31 | 0 | 0 | 1,023 |
| Nov 1–7 | 0 | 0 | 676 |
| Nov 8–14 | 2 | 2 | 593 |
| Nov 15–21 | 0 | 0 | 384 |
| Nov 22–28 | 3 | 3 | 496 |
| Nov 29 – Dec 5 | 4 | 2 | 356 |
| Dec 6–12 | 3 | 1 | 478 |
| Dec 13–19 | 2 | 1 | 285 |
| Dec 20–26 | 1 | 1 | 322 |
| Dec 27 – Jan 2 | 3 | 3 | 388 |
In Ohio
Late November to mid-April, middle week Feb 15–21
Middle week · Feb 15–21
This week · Nov 8–14
Show over the bars
Records per week from 635 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 366 dates. Latest record: December 2025.
Show as a table
| Week | Records of Redhead | Years recorded | Records of all species |
|---|---|---|---|
| Jan 4–10 | 34 | 10 | 6,211 |
| Jan 11–17 | 13 | 8 | 5,146 |
| Jan 18–24 | 25 | 7 | 4,645 |
| Jan 25–31 | 40 | 9 | 4,698 |
| Feb 1–7 | 52 | 8 | 6,023 |
| Feb 8–14 | 59 | 7 | 5,888 |
| Feb 15–21 | 53 | 10 | 5,436 |
| Feb 22–28 | 66 | 9 | 6,846 |
| Mar 1–7 | 50 | 9 | 8,321 |
| Mar 8–14 | 39 | 10 | 10,384 |
| Mar 15–21 | 30 | 8 | 12,620 |
| Mar 22–28 | 20 | 9 | 13,949 |
| Mar 29 – Apr 4 | 21 | 7 | 19,661 |
| Apr 5–11 | 10 | 5 | 26,860 |
| Apr 12–18 | 5 | 4 | 39,925 |
| Apr 19–25 | 2 | 2 | 41,623 |
| Apr 26 – May 2 | 2 | 2 | 56,391 |
| May 3–9 | 5 | 4 | 52,952 |
| May 10–16 | 6 | 4 | 53,785 |
| May 17–23 | 1 | 1 | 57,698 |
| May 24–30 | 2 | 2 | 54,651 |
| May 31 – Jun 6 | 2 | 1 | 53,099 |
| Jun 7–13 | 2 | 2 | 53,700 |
| Jun 14–20 | 0 | 0 | 56,625 |
| Jun 21–27 | 1 | 1 | 55,361 |
| Jun 28 – Jul 4 | 1 | 1 | 58,477 |
| Jul 5–11 | 1 | 1 | 61,336 |
| Jul 12–18 | 1 | 1 | 64,722 |
| Jul 19–25 | 1 | 1 | 69,753 |
| Jul 26 – Aug 1 | 0 | 0 | 59,416 |
| Aug 2–8 | 2 | 2 | 59,712 |
| Aug 9–15 | 0 | 0 | 55,994 |
| Aug 16–22 | 0 | 0 | 54,328 |
| Aug 23–29 | 1 | 1 | 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 | 1 | 1 | 43,180 |
| Oct 4–10 | 3 | 2 | 37,841 |
| Oct 11–17 | 1 | 1 | 30,824 |
| Oct 18–24 | 2 | 1 | 21,156 |
| Oct 25–31 | 4 | 2 | 19,021 |
| Nov 1–7 | 2 | 2 | 14,172 |
| Nov 8–14 | 3 | 3 | 12,621 |
| Nov 15–21 | 1 | 1 | 7,965 |
| Nov 22–28 | 15 | 5 | 8,136 |
| Nov 29 – Dec 5 | 5 | 3 | 6,083 |
| Dec 6–12 | 8 | 4 | 6,004 |
| Dec 13–19 | 12 | 6 | 5,423 |
| Dec 20–26 | 9 | 7 | 5,661 |
| Dec 27 – Jan 2 | 21 | 7 | 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.
Relatives
In the same genus
Other Aythya recorded in Hamilton County
Identification
How to identify it
Look-alikes
Land cover
Often confused with
- Mallard Anas platyrhynchosOften confused in Ohio: 11 identifications in Ohio named one where the other was meant
- Canvasback Aythya valisineria102 identifications worldwide named one where the other was meant
- Ring-necked Duck Aythya collaris97 identifications worldwide named one where the other was meant
- Lesser Scaup Aythya affinis71 identifications worldwide named one where the other was meant
- Green-winged Teal Anas crecca29 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 | 62%3% |
| Developed | 22%49% |
| Farmland | 8%11% |
| Forest | 3%31% |
| Grassland and shrub | 2%0.9% |
| Wetland | 2%5% |
From 237 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
635 records from 2 datasets.
- iNaturalist Research-grade Observations (opens in a new tab) · iNaturalist.org · 631 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 · 4 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.