Season shown in 1 of Ohio's 88 counties. Explore Ohio
No result yet (45)
Recorded, too few records for a result (39)
Recorded, season not shown (3)
Season shown (1)
Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files, 1:500,000. Show as a table
Counties as a table
Eastern Dobsonfly by Ohio county: records and mapped range
County
Records
Adams County
Recorded, too few records for a result
Allen County
No qualifying records yet
Ashland County
Recorded, too few records for a result
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
Recorded, too few records for a result
Brown County
Recorded, too few records for a result
Butler County
Recorded, too few records for a result
Carroll County
No qualifying records yet
Champaign County
No qualifying records yet
Clark County
Recorded, too few records for a result
Clermont County
20 · Recorded, season not shown
Clinton County
Recorded, too few records for a result
Columbiana County
Recorded, too few records for a result
Coshocton County
Recorded, too few records for a result
Crawford County
No qualifying records yet
Cuyahoga County
No qualifying records yet
Darke County
No qualifying records yet
Defiance County
No qualifying records yet
Delaware County
Recorded, too few records for a result
Erie County
No qualifying records yet
Fairfield County
Recorded, too few records for a result
Fayette County
No qualifying records yet
Franklin County
28 · Recorded, season not shown
Fulton County
No qualifying records yet
Gallia County
Recorded, too few records for a result
Geauga County
No qualifying records yet
Greene County
Recorded, too few records for a result
Guernsey County
No qualifying records yet
Hamilton County
20 · Recorded, season not shown
Hancock County
No qualifying records yet
Hardin County
No qualifying records yet
Harrison County
No qualifying records yet
Henry County
No qualifying records yet
Highland County
53 · Season shown
Hocking County
Recorded, too few records for a result
Holmes County
No qualifying records yet
Huron County
Recorded, too few records for a result
Jackson County
No qualifying records yet
Jefferson County
Recorded, too few records for a result
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
No qualifying records yet
Madison County
Recorded, too few records for a result
Mahoning County
No qualifying records yet
Marion County
No qualifying records yet
Medina County
No qualifying records yet
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
Recorded, too few records for a result
Morrow County
No qualifying records yet
Muskingum County
Recorded, too few records for a result
Noble County
No qualifying records yet
Ottawa County
No qualifying records yet
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
Recorded, too few records for a result
Putnam County
No qualifying records yet
Richland County
No qualifying records yet
Ross County
Recorded, too few records for a result
Sandusky County
Recorded, too few records for a result
Scioto County
Recorded, too few records for a result
Seneca County
Recorded, too few records for a result
Shelby County
No qualifying records yet
Stark County
No qualifying records yet
Summit County
Recorded, too few records for a result
Trumbull County
No qualifying records yet
Tuscarawas County
Recorded, too few records for a result
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
No qualifying records yet
Williams County
No qualifying records yet
Wood County
No qualifying records yet
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 Clermont County
Not enough evidence
The weeks are still too uncertain to show a season. Based on 20 records in 7 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 Clermont County · records of all species each week, 25,341 in all
Records per week from 20 records in 7 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 Eastern Dobsonfly in Clermont County each week, and records of all species
Week
Records of Eastern Dobsonfly
Years recorded
Records of all species
Jan 4–10
0
0
44
Jan 11–17
0
0
36
Jan 18–24
0
0
40
Jan 25–31
0
0
86
Feb 1–7
0
0
49
Feb 8–14
0
0
75
Feb 15–21
0
0
68
Feb 22–28
0
0
92
Mar 1–7
0
0
134
Mar 8–14
0
0
161
Mar 15–21
0
0
261
Mar 22–28
0
0
268
Mar 29 – Apr 4
0
0
390
Apr 5–11
0
0
469
Apr 12–18
0
0
705
Apr 19–25
0
0
753
Apr 26 – May 2
0
0
745
May 3–9
0
0
760
May 10–16
0
0
589
May 17–23
1
1
898
May 24–30
0
0
1,116
May 31 – Jun 6
0
0
977
Jun 7–13
1
1
942
Jun 14–20
1
1
920
Jun 21–27
2
1
793
Jun 28 – Jul 4
0
0
900
Jul 5–11
1
1
921
Jul 12–18
2
2
886
Jul 19–25
4
2
1,229
Jul 26 – Aug 1
1
1
813
Aug 2–8
2
2
1,003
Aug 9–15
2
2
850
Aug 16–22
1
1
880
Aug 23–29
1
1
817
Aug 30 – Sep 5
0
0
846
Sep 6–12
1
1
830
Sep 13–19
0
0
642
Sep 20–26
0
0
529
Sep 27 – Oct 3
0
0
494
Oct 4–10
0
0
400
Oct 11–17
0
0
395
Oct 18–24
0
0
254
Oct 25–31
0
0
349
Nov 1–7
0
0
167
Nov 8–14
0
0
170
Nov 15–21
0
0
132
Nov 22–28
0
0
115
Nov 29 – Dec 5
0
0
95
Dec 6–12
0
0
55
Dec 13–19
0
0
60
Dec 20–26
0
0
59
Dec 27 – Jan 2
0
0
79
Reported as an adult
Only 15 records here are marked as adults, too few to show a adult season. One needs at least 20 records from 5 different years.
Reported as a larva
Only 5 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
Early May to early October, middle week Jul 19–25
Middle week · Jul 19–25
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 394 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 256 dates. Latest record: November 2025.
Show as a table
Records of Eastern Dobsonfly in Ohio each week, and records of all species
Week
Records of Eastern Dobsonfly
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
0
0
4,698
Feb 1–7
0
0
6,023
Feb 8–14
1
1
5,888
Feb 15–21
0
0
5,436
Feb 22–28
2
1
6,846
Mar 1–7
1
1
8,321
Mar 8–14
0
0
10,384
Mar 15–21
1
1
12,620
Mar 22–28
0
0
13,949
Mar 29 – Apr 4
1
1
19,661
Apr 5–11
1
1
26,860
Apr 12–18
1
1
39,925
Apr 19–25
4
4
41,623
Apr 26 – May 2
3
2
56,391
May 3–9
8
5
52,952
May 10–16
5
2
53,785
May 17–23
7
3
57,698
May 24–30
2
2
54,651
May 31 – Jun 6
10
6
53,099
Jun 7–13
11
5
53,700
Jun 14–20
15
8
56,625
Jun 21–27
19
7
55,361
Jun 28 – Jul 4
28
8
58,477
Jul 5–11
32
9
61,336
Jul 12–18
39
9
64,722
Jul 19–25
85
9
69,753
Jul 26 – Aug 1
19
7
59,416
Aug 2–8
8
6
59,712
Aug 9–15
20
7
55,994
Aug 16–22
5
4
54,328
Aug 23–29
6
4
51,772
Aug 30 – Sep 5
11
3
57,167
Sep 6–12
7
5
59,075
Sep 13–19
7
4
54,543
Sep 20–26
9
7
45,860
Sep 27 – Oct 3
5
3
43,180
Oct 4–10
6
6
37,841
Oct 11–17
5
4
30,824
Oct 18–24
3
2
21,156
Oct 25–31
2
2
19,021
Nov 1–7
0
0
14,172
Nov 8–14
2
2
12,621
Nov 15–21
1
1
7,965
Nov 22–28
0
0
8,136
Nov 29 – Dec 5
0
0
6,083
Dec 6–12
1
1
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 late June to early August, middle week Jul 19–25.
From 232 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. Recorded in two separate seasons, so one season would put its middle week in the gap.
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.
Spring FishflyChauliodes rastricornisOften confused in Ohio: 13 identifications in Ohio named one where the other was meant
Summer FishflyChauliodes pectinicornisOften confused in Ohio: 12 identifications in Ohio named one where the other was meant
Saw-combed FishflyNigronia serricornis106 identifications worldwide named one where the other was meant
Neohermes concolorNeohermes concolor26 identifications worldwide named one where the other was meant
Banded Dark FishflyNigronia fasciata20 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 recordsUsually early May to early October, middle week mid-July · 394 records
Reported as maleUsually mid-June to early August, middle week mid-July · 89 records
Reported as femaleUsually late June to early August, middle week mid-July · 143 records
Reported as an adultUsually late June to early August, middle week mid-July · 232 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: no record
Feb: recorded
Mar: recorded
Apr: recorded
May: recorded
Jun: recorded
Jul: recorded
Aug: recorded
Sep: recorded
Oct: recorded
Nov: recorded
Dec: recorded
Not reported in Ohio in January, 2016 to 2025.
Time of day it is recorded
midnight6 amnoon6 pm
From 390 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
44%49%
Forest
35%31%
Farmland
8%11%
Open water
6%3%
Barren
5%0.6%
Wetland
3%5%
Grassland and shrub
0.5%0.9%
From 202 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.
