Season shown in 2 of Ohio's 88 counties. Explore Ohio
No result yet (43)
Recorded, too few records for a result (43)
Recorded, season not shown (0)
Season shown (2)
Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files, 1:500,000. Show as a table
Counties as a table
Spring Fishfly by Ohio county: records and mapped range
County
Records
Adams County
No qualifying records yet
Allen County
Recorded, too few records for a result
Ashland County
No qualifying records yet
Ashtabula County
Recorded, too few records for a result
Athens County
Recorded, too few records for a result
Auglaize County
No qualifying records yet
Belmont County
No qualifying records yet
Brown County
No qualifying records yet
Butler County
Recorded, too few records for a result
Carroll County
No qualifying records yet
Champaign County
No qualifying records yet
Clark County
No qualifying records yet
Clermont County
Recorded, too few records for a result
Clinton County
No qualifying records yet
Columbiana County
No qualifying records yet
Coshocton County
Recorded, too few records for a result
Crawford County
Recorded, too few records for a result
Cuyahoga County
Recorded, too few records for a result
Darke County
Recorded, too few records for a result
Defiance County
No qualifying records yet
Delaware County
Recorded, too few records for a result
Erie County
Recorded, too few records for a result
Fairfield County
Recorded, too few records for a result
Fayette County
No qualifying records yet
Franklin County
20 · Season shown
Fulton County
No qualifying records yet
Gallia County
No qualifying records yet
Geauga County
24 · Season shown
Greene County
No qualifying records yet
Guernsey County
Recorded, too few records for a result
Hamilton County
Recorded, too few records for a result
Hancock County
Recorded, too few records for a result
Hardin County
No qualifying records yet
Harrison County
Recorded, too few records for a result
Henry County
No qualifying records yet
Highland County
Recorded, too few records for a result
Hocking County
No qualifying records yet
Holmes County
Recorded, too few records for a result
Huron County
No qualifying records yet
Jackson County
No qualifying records yet
Jefferson County
No qualifying records yet
Knox County
Recorded, too few records for a result
Lake County
Recorded, too few records for a result
Lawrence County
No qualifying records yet
Licking County
Recorded, too few records for a result
Logan County
No qualifying records yet
Lorain County
Recorded, too few records for a result
Lucas County
Recorded, too few records for a result
Madison County
No qualifying records yet
Mahoning County
Recorded, too few records for a result
Marion County
Recorded, too few records for a result
Medina County
Recorded, too few records for a result
Meigs County
No qualifying records yet
Mercer County
No qualifying records yet
Miami County
Recorded, too few records for a result
Monroe County
No qualifying records yet
Montgomery County
Recorded, too few records for a result
Morgan County
No qualifying records yet
Morrow County
Recorded, too few records for a result
Muskingum County
No qualifying records yet
Noble County
No qualifying records yet
Ottawa County
Recorded, too few records for a result
Paulding County
No qualifying records yet
Perry County
No qualifying records yet
Pickaway County
Recorded, too few records for a result
Pike County
Recorded, too few records for a result
Portage County
Recorded, too few records for a result
Preble County
No qualifying records yet
Putnam County
No qualifying records yet
Richland County
Recorded, too few records for a result
Ross County
Recorded, too few records for a result
Sandusky County
No qualifying records yet
Scioto County
No qualifying records yet
Seneca County
Recorded, too few records for a result
Shelby County
No qualifying records yet
Stark County
Recorded, too few records for a result
Summit County
Recorded, too few records for a result
Trumbull County
Recorded, too few records for a result
Tuscarawas County
No qualifying records yet
Union County
No qualifying records yet
Van Wert County
No qualifying records yet
Vinton County
Recorded, too few records for a result
Warren County
Recorded, too few records for a result
Washington County
No qualifying records yet
Wayne County
Recorded, too few records for a result
Williams County
No qualifying records yet
Wood County
Recorded, too few records for a result
Wyandot County
No qualifying records yet
No mapped range from the range source used, the USGS Gap Analysis Project, which maps land vertebrates only.
Season
When it is recorded
In Geauga County
Early May to early June, middle week May 24–30
Middle week · May 24–30
This week · Nov 8–14
JanFebMarAprMayJunJulAugSepOctNovDec
Show over the bars
Recording in Geauga County · records of all species each week, 18,220 in all
Records per week from 24 records in 6 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 19 dates. Latest record: June 2025.
Show as a table
Records of Spring Fishfly in Geauga County each week, and records of all species
Week
Records of Spring Fishfly
Years recorded
Records of all species
Jan 4–10
0
0
92
Jan 11–17
0
0
20
Jan 18–24
0
0
17
Jan 25–31
0
0
70
Feb 1–7
0
0
24
Feb 8–14
0
0
28
Feb 15–21
0
0
64
Feb 22–28
0
0
24
Mar 1–7
0
0
46
Mar 8–14
0
0
36
Mar 15–21
0
0
71
Mar 22–28
0
0
71
Mar 29 – Apr 4
0
0
165
Apr 5–11
0
0
168
Apr 12–18
0
0
279
Apr 19–25
0
0
375
Apr 26 – May 2
1
1
491
May 3–9
0
0
571
May 10–16
6
2
554
May 17–23
4
3
638
May 24–30
4
4
735
May 31 – Jun 6
3
2
688
Jun 7–13
5
2
844
Jun 14–20
0
0
701
Jun 21–27
1
1
791
Jun 28 – Jul 4
0
0
699
Jul 5–11
0
0
824
Jul 12–18
0
0
712
Jul 19–25
0
0
738
Jul 26 – Aug 1
0
0
811
Aug 2–8
0
0
730
Aug 9–15
0
0
859
Aug 16–22
0
0
600
Aug 23–29
0
0
715
Aug 30 – Sep 5
0
0
713
Sep 6–12
0
0
619
Sep 13–19
0
0
437
Sep 20–26
0
0
388
Sep 27 – Oct 3
0
0
331
Oct 4–10
0
0
258
Oct 11–17
0
0
281
Oct 18–24
0
0
239
Oct 25–31
0
0
187
Nov 1–7
0
0
63
Nov 8–14
0
0
106
Nov 15–21
0
0
58
Nov 22–28
0
0
25
Nov 29 – Dec 5
0
0
42
Dec 6–12
0
0
53
Dec 13–19
0
0
49
Dec 20–26
0
0
29
Dec 27 – Jan 2
0
0
91
Reported as an adult
Usually reported as an adult early May to early June, middle week May 24–30.
From 23 records that are marked as adults. Not every photo is marked with a life stage, so this shows when people reported it as an adult, not when adults are about.
Reported as a larva
Only 1 records here are marked as larvae, too few to show a larva season. One needs at least 20 records from 5 different years.
In Ohio
Not enough evidence
The weeks are still too uncertain to show a season. Based on 371 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 371 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 Spring Fishfly in Ohio each week, and records of all species
Week
Records of Spring Fishfly
Years recorded
Records of all species
Jan 4–10
0
0
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
0
0
6,023
Feb 8–14
1
1
5,888
Feb 15–21
3
1
5,436
Feb 22–28
0
0
6,846
Mar 1–7
4
4
8,321
Mar 8–14
4
2
10,384
Mar 15–21
3
3
12,620
Mar 22–28
0
0
13,949
Mar 29 – Apr 4
2
2
19,661
Apr 5–11
5
3
26,860
Apr 12–18
2
2
39,925
Apr 19–25
2
2
41,623
Apr 26 – May 2
9
4
56,391
May 3–9
35
5
52,952
May 10–16
48
7
53,785
May 17–23
63
8
57,698
May 24–30
62
10
54,651
May 31 – Jun 6
39
9
53,099
Jun 7–13
34
7
53,700
Jun 14–20
13
6
56,625
Jun 21–27
10
4
55,361
Jun 28 – Jul 4
3
2
58,477
Jul 5–11
2
2
61,336
Jul 12–18
2
2
64,722
Jul 19–25
3
1
69,753
Jul 26 – Aug 1
2
1
59,416
Aug 2–8
3
2
59,712
Aug 9–15
4
4
55,994
Aug 16–22
1
1
54,328
Aug 23–29
4
3
51,772
Aug 30 – Sep 5
3
2
57,167
Sep 6–12
2
2
59,075
Sep 13–19
0
0
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
0
0
21,156
Oct 25–31
1
1
19,021
Nov 1–7
0
0
14,172
Nov 8–14
0
0
12,621
Nov 15–21
0
0
7,965
Nov 22–28
0
0
8,136
Nov 29 – Dec 5
0
0
6,083
Dec 6–12
0
0
6,004
Dec 13–19
0
0
5,423
Dec 20–26
0
0
5,661
Dec 27 – Jan 2
1
1
8,459
Reported as an adult
Usually reported as an adult early May to late July, middle week May 24–30.
From 341 records that are marked as adults. Not every photo is marked with a life stage, so this shows when people reported it as an adult, not when adults are about.
Reported as a larva
No larva season shown here. The weeks are still too uncertain to show a season.
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.
Summer FishflyChauliodes pectinicornisOften confused in Ohio: 38 identifications in Ohio named one where the other was meant
Eastern DobsonflyCorydalus cornutusOften confused in Ohio: 13 identifications in Ohio named one where the other was meant
Neohermes concolorNeohermes concolor32 identifications worldwide named one where the other was meant
Saw-combed FishflyNigronia serricornis19 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.
When each is reported
All recordsNo season shown · 371 records
Reported as maleUsually early May to early August, middle week mid-May · 186 records
Reported as an adultUsually early May to late July, middle week late May · 341 records
Not every photo is marked with a sex or a sign, so these show when people reported each, not when it happens.
Months not reported
Jan: recorded
Feb: recorded
Mar: recorded
Apr: recorded
May: recorded
Jun: recorded
Jul: recorded
Aug: recorded
Sep: recorded
Oct: recorded
Nov: no record
Dec: recorded
Not reported in Ohio in November, 2016 to 2025.
Time of day it is recorded
midnight6 amnoon6 pm
From 370 Ohio records with a time. Most records are made when people are outside, so night and early-morning species are under-recorded.
Land cover where it is recorded
Land cover
Its recordsAll Ohio records
Developed
60%49%
Forest
19%31%
Farmland
11%11%
Wetland
9%5%
Barren
0.5%0.6%
Grassland and shrub
0.5%0.9%
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
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.
