Season shown in 0 of Ohio's 88 counties. Its mapped range covers 88. Explore Ohio
No result yet (0)
Within its mapped range (11)
Recorded, too few records for a result (48)
Recorded, season not shown (29)
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
Mallard by Ohio county: records and mapped range
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
20 · Recorded, season not shown
Yes: year-round
Athens County
29 · 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
71 · 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
21 · Recorded, season not shown
Yes: year-round
Clermont County
39 · Recorded, season not shown
Yes: year-round
Clinton County
Recorded, too few records for a result
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
No qualifying records yet
Yes: year-round
Cuyahoga County
755 · Recorded, season not 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
82 · Recorded, season not shown
Yes: year-round
Erie County
74 · 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
702 · Recorded, season not shown
Yes: year-round
Fulton County
No qualifying records yet
Yes: year-round
Gallia County
Recorded, too few records for a result
Yes: year-round
Geauga County
30 · Recorded, season not shown
Yes: year-round
Greene County
152 · Recorded, season not shown
Yes: year-round
Guernsey County
Recorded, too few records for a result
Yes: year-round
Hamilton County
296 · Recorded, season not shown
Yes: year-round
Hancock County
20 · Recorded, season not shown
Yes: year-round
Hardin County
Recorded, too few records for a result
Yes: year-round
Harrison County
No qualifying records yet
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
Recorded, too few records for a result
Yes: year-round
Jackson County
Recorded, too few records for a result
Yes: year-round
Jefferson County
Recorded, too few records for a result
Yes: year-round
Knox County
Recorded, too few records for a result
Yes: year-round
Lake County
167 · Recorded, season not shown
Yes: year-round
Lawrence County
No qualifying records yet
Yes: year-round
Licking County
28 · Recorded, season not shown
Yes: year-round
Logan County
217 · Recorded, season not shown
Yes: year-round
Lorain County
228 · Recorded, season not shown
Yes: year-round
Lucas County
119 · Recorded, season not shown
Yes: year-round
Madison County
Recorded, too few records for a result
Yes: year-round
Mahoning County
44 · Recorded, season not shown
Yes: year-round
Marion County
Recorded, too few records for a result
Yes: year-round
Medina County
83 · Recorded, season not shown
Yes: year-round
Meigs County
No qualifying records yet
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
No qualifying records yet
Yes: year-round
Montgomery County
191 · Recorded, season not shown
Yes: year-round
Morgan County
Recorded, too few records for a result
Yes: year-round
Morrow County
No qualifying records yet
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
70 · Recorded, season not shown
Yes: year-round
Paulding County
No qualifying records yet
Yes: year-round
Perry County
Recorded, too few records for a result
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
108 · 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
24 · Recorded, season not shown
Yes: year-round
Ross County
Recorded, too few records for a result
Yes: year-round
Sandusky County
Recorded, too few records for a result
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
104 · Recorded, season not shown
Yes: year-round
Summit County
1,003 · 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
Recorded, too few records for a result
Yes: year-round
Warren County
70 · Recorded, season not shown
Yes: year-round
Washington County
Recorded, too few records for a result
Yes: year-round
Wayne County
37 · Recorded, season not shown
Yes: year-round
Williams County
No qualifying records yet
Yes: year-round
Wood County
22 · Recorded, season not shown
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
The weeks are still too uncertain to show a season. Based on 74 records in 8 of the 10 years from 2016 to 2025, above the minimum of 20 records from 5 different years.
JanFebMarAprMayJunJulAugSepOctNovDec
Show over the bars
Recording in Erie County · records of all species each week, 14,434 in all
Records per week from 74 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
Records of Mallard in Erie County each week, and records of all species
Week
Records of Mallard
Years recorded
Records of all species
Jan 4–10
1
1
47
Jan 11–17
0
0
75
Jan 18–24
0
0
52
Jan 25–31
0
0
67
Feb 1–7
1
1
70
Feb 8–14
0
0
21
Feb 15–21
3
3
52
Feb 22–28
2
2
60
Mar 1–7
1
1
90
Mar 8–14
0
0
90
Mar 15–21
0
0
79
Mar 22–28
1
1
93
Mar 29 – Apr 4
1
1
82
Apr 5–11
3
3
499
Apr 12–18
3
2
555
Apr 19–25
1
1
531
Apr 26 – May 2
2
2
590
May 3–9
2
2
519
May 10–16
9
5
765
May 17–23
7
4
697
May 24–30
6
3
548
May 31 – Jun 6
1
1
427
Jun 7–13
3
3
381
Jun 14–20
3
3
384
Jun 21–27
1
1
273
Jun 28 – Jul 4
0
0
316
Jul 5–11
0
0
605
Jul 12–18
1
1
329
Jul 19–25
2
2
514
Jul 26 – Aug 1
4
3
527
Aug 2–8
0
0
409
Aug 9–15
3
3
422
Aug 16–22
2
2
699
Aug 23–29
1
1
309
Aug 30 – Sep 5
0
0
440
Sep 6–12
0
0
392
Sep 13–19
0
0
444
Sep 20–26
2
2
398
Sep 27 – Oct 3
0
0
248
Oct 4–10
0
0
260
Oct 11–17
0
0
148
Oct 18–24
0
0
176
Oct 25–31
1
1
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
2
2
29
Dec 20–26
1
1
54
Dec 27 – Jan 2
3
2
61
In Ohio
Recorded all year
Recorded through most of the year, so there is no single season to show. Based on 7,381 records in 10 of the 10 years from 2016 to 2025, above the minimum of 20 records from 5 different years.
This week · Nov 8–14
JanFebMarAprMayJunJulAugSepOctNovDec
Show over the bars
Recording in Ohio · records of all species each week, 1,691,199 in all
Records per week from 7,381 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 Mallard in Ohio each week, and records of all species
Week
Records of Mallard
Years recorded
Records of all species
Jan 4–10
137
10
6,211
Jan 11–17
116
10
5,146
Jan 18–24
75
10
4,645
Jan 25–31
73
10
4,698
Feb 1–7
131
9
6,023
Feb 8–14
108
9
5,888
Feb 15–21
80
9
5,436
Feb 22–28
123
10
6,846
Mar 1–7
142
10
8,321
Mar 8–14
188
10
10,384
Mar 15–21
170
10
12,620
Mar 22–28
152
10
13,949
Mar 29 – Apr 4
189
10
19,661
Apr 5–11
200
10
26,860
Apr 12–18
278
10
39,925
Apr 19–25
276
10
41,623
Apr 26 – May 2
376
10
56,391
May 3–9
338
10
52,952
May 10–16
329
10
53,785
May 17–23
227
10
57,698
May 24–30
196
10
54,651
May 31 – Jun 6
154
9
53,099
Jun 7–13
127
9
53,700
Jun 14–20
115
9
56,625
Jun 21–27
91
10
55,361
Jun 28 – Jul 4
104
9
58,477
Jul 5–11
90
9
61,336
Jul 12–18
94
10
64,722
Jul 19–25
89
10
69,753
Jul 26 – Aug 1
95
9
59,416
Aug 2–8
85
9
59,712
Aug 9–15
86
10
55,994
Aug 16–22
116
10
54,328
Aug 23–29
88
10
51,772
Aug 30 – Sep 5
108
9
57,167
Sep 6–12
120
9
59,075
Sep 13–19
141
10
54,543
Sep 20–26
133
10
45,860
Sep 27 – Oct 3
120
10
43,180
Oct 4–10
154
10
37,841
Oct 11–17
126
10
30,824
Oct 18–24
113
9
21,156
Oct 25–31
112
10
19,021
Nov 1–7
123
10
14,172
Nov 8–14
152
9
12,621
Nov 15–21
112
10
7,965
Nov 22–28
155
10
8,136
Nov 29 – Dec 5
77
10
6,083
Dec 6–12
86
9
6,004
Dec 13–19
105
10
5,423
Dec 20–26
77
10
5,661
Dec 27 – Jan 2
129
10
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
Telling it apart
From what Ohio’s records show. Only what the records support is shown.
American Black DuckAnas rubripesOften confused in Ohio: 61 identifications in Ohio named one where the other was meant
Wood DuckAix sponsaOften confused in Ohio: 40 identifications in Ohio named one where the other was meant
Northern ShovelerSpatula clypeataOften confused in Ohio: 17 identifications in Ohio named one where the other was meant
Red-breasted MerganserMergus serratorOften confused in Ohio: 11 identifications in Ohio named one where the other was meant
RedheadAythya americanaOften confused in Ohio: 11 identifications in Ohio 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.
When each is reported
All recordsNo season shown · 7,381 records
Reported as maleUsually mid-October to early June, middle week mid-March · 443 records
Not every photo is marked with a sex or a sign, so these show when people reported each, not when it happens.
Land cover where it is recorded
Land cover
Its recordsAll Ohio records
Developed
56%49%
Open water
18%3%
Forest
10%31%
Wetland
9%5%
Farmland
6%11%
Grassland and shrub
2%0.9%
Barren
0.6%0.6%
From 3,149 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
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.
