Season shown in 35 of Ohio's 88 counties. Explore Ohio
No result yet (0)
Recorded, too few records for a result (7)
Recorded, season not shown (46)
Season shown (35)
Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files, 1:500,000. Show as a table
Counties as a table
Blue Dasher by Ohio county: records and mapped range
County
Records
Adams County
42 · Recorded, season not shown
Allen County
49 · Recorded, season not shown
Ashland County
23 · Recorded, season not shown
Ashtabula County
239 · Season shown
Athens County
45 · Recorded, season not shown
Auglaize County
48 · Recorded, season not shown
Belmont County
43 · Recorded, season not shown
Brown County
39 · Recorded, season not shown
Butler County
56 · Season shown
Carroll County
Recorded, too few records for a result
Champaign County
145 · Season shown
Clark County
133 · Season shown
Clermont County
126 · Season shown
Clinton County
22 · Recorded, season not shown
Columbiana County
46 · Recorded, season not shown
Coshocton County
96 · Recorded, season not shown
Crawford County
32 · Recorded, season not shown
Cuyahoga County
296 · Season shown
Darke County
57 · Season shown
Defiance County
Recorded, too few records for a result
Delaware County
107 · Season shown
Erie County
112 · Season shown
Fairfield County
70 · Recorded, season not shown
Fayette County
61 · Recorded, season not shown
Franklin County
796 · Season shown
Fulton County
20 · Season shown
Gallia County
80 · Recorded, season not shown
Geauga County
176 · Season shown
Greene County
269 · Season shown
Guernsey County
36 · Recorded, season not shown
Hamilton County
195 · Season shown
Hancock County
34 · Season shown
Hardin County
77 · Recorded, season not shown
Harrison County
21 · Recorded, season not shown
Henry County
Recorded, too few records for a result
Highland County
23 · Recorded, season not shown
Hocking County
43 · Season shown
Holmes County
45 · Season shown
Huron County
41 · Season shown
Jackson County
57 · Recorded, season not shown
Jefferson County
71 · Recorded, season not shown
Knox County
67 · Season shown
Lake County
231 · Season shown
Lawrence County
76 · Recorded, season not shown
Licking County
168 · Season shown
Logan County
177 · Season shown
Lorain County
302 · Recorded, season not shown
Lucas County
490 · Season shown
Madison County
76 · Recorded, season not shown
Mahoning County
68 · Recorded, season not shown
Marion County
70 · Recorded, season not shown
Medina County
124 · Recorded, season not shown
Meigs County
70 · Recorded, season not shown
Mercer County
Recorded, too few records for a result
Miami County
78 · Season shown
Monroe County
57 · Season shown
Montgomery County
158 · Season shown
Morgan County
38 · Recorded, season not shown
Morrow County
82 · Recorded, season not shown
Muskingum County
29 · Season shown
Noble County
48 · Recorded, season not shown
Ottawa County
122 · Season shown
Paulding County
23 · Recorded, season not shown
Perry County
27 · Recorded, season not shown
Pickaway County
82 · Season shown
Pike County
21 · Recorded, season not shown
Portage County
119 · Season shown
Preble County
Recorded, too few records for a result
Putnam County
Recorded, too few records for a result
Richland County
51 · Season shown
Ross County
30 · Recorded, season not shown
Sandusky County
34 · Season shown
Scioto County
57 · Recorded, season not shown
Seneca County
45 · Recorded, season not shown
Shelby County
50 · Recorded, season not shown
Stark County
158 · Recorded, season not shown
Summit County
606 · Season shown
Trumbull County
73 · Recorded, season not shown
Tuscarawas County
52 · Recorded, season not shown
Union County
82 · Recorded, season not shown
Van Wert County
23 · Recorded, season not shown
Vinton County
36 · Recorded, season not shown
Warren County
106 · Recorded, season not shown
Washington County
Recorded, too few records for a result
Wayne County
81 · Season shown
Williams County
26 · Recorded, season not shown
Wood County
57 · Season shown
Wyandot County
59 · Recorded, season not shown
No mapped range from the range source used, the USGS Gap Analysis Project, which maps land vertebrates only.
Season
When it is recorded
In Delaware County
Late May to early September, middle week Jul 5–11
Middle week · Jul 5–11
This week · Nov 8–14
JanFebMarAprMayJunJulAugSepOctNovDec
Show over the bars
Recording in Delaware County · records of all species each week, 21,087 in all
Records per week from 107 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 66 dates. Latest record: September 2025.
Show as a table
Records of Blue Dasher in Delaware County each week, and records of all species
Week
Records of Blue Dasher
Years recorded
Records of all species
Jan 4–10
0
0
75
Jan 11–17
0
0
35
Jan 18–24
0
0
37
Jan 25–31
0
0
28
Feb 1–7
0
0
33
Feb 8–14
0
0
56
Feb 15–21
0
0
38
Feb 22–28
0
0
36
Mar 1–7
0
0
73
Mar 8–14
0
0
118
Mar 15–21
0
0
111
Mar 22–28
0
0
120
Mar 29 – Apr 4
0
0
208
Apr 5–11
0
0
304
Apr 12–18
0
0
810
Apr 19–25
0
0
622
Apr 26 – May 2
0
0
561
May 3–9
0
0
539
May 10–16
0
0
620
May 17–23
2
1
560
May 24–30
2
2
640
May 31 – Jun 6
8
2
751
Jun 7–13
7
4
746
Jun 14–20
7
2
593
Jun 21–27
10
3
623
Jun 28 – Jul 4
13
5
725
Jul 5–11
12
6
597
Jul 12–18
4
3
785
Jul 19–25
13
5
848
Jul 26 – Aug 1
5
3
646
Aug 2–8
6
5
665
Aug 9–15
4
3
612
Aug 16–22
3
2
684
Aug 23–29
3
1
775
Aug 30 – Sep 5
0
0
782
Sep 6–12
3
2
1,111
Sep 13–19
0
0
827
Sep 20–26
5
3
663
Sep 27 – Oct 3
0
0
686
Oct 4–10
0
0
576
Oct 11–17
0
0
411
Oct 18–24
0
0
350
Oct 25–31
0
0
245
Nov 1–7
0
0
181
Nov 8–14
0
0
112
Nov 15–21
0
0
101
Nov 22–28
0
0
93
Nov 29 – Dec 5
0
0
55
Dec 6–12
0
0
39
Dec 13–19
0
0
56
Dec 20–26
0
0
39
Dec 27 – Jan 2
0
0
86
Reported as an adult
Only 9 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
No records here are marked as larvae yet, so there is no larva season to show. One needs at least 20 records from 5 different years.
In Ohio
Late May to early September, middle week Jul 12–18
Middle week · Jul 12–18
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 12,676 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 1,232 dates. Latest record: October 2025.
Show as a table
Records of Blue Dasher in Ohio each week, and records of all species
Week
Records of Blue Dasher
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
0
0
5,888
Feb 15–21
0
0
5,436
Feb 22–28
0
0
6,846
Mar 1–7
0
0
8,321
Mar 8–14
0
0
10,384
Mar 15–21
0
0
12,620
Mar 22–28
0
0
13,949
Mar 29 – Apr 4
0
0
19,661
Apr 5–11
0
0
26,860
Apr 12–18
1
1
39,925
Apr 19–25
9
2
41,623
Apr 26 – May 2
11
4
56,391
May 3–9
33
4
52,952
May 10–16
38
5
53,785
May 17–23
180
7
57,698
May 24–30
425
9
54,651
May 31 – Jun 6
533
10
53,099
Jun 7–13
653
10
53,700
Jun 14–20
919
10
56,625
Jun 21–27
1,017
10
55,361
Jun 28 – Jul 4
946
10
58,477
Jul 5–11
1,138
10
61,336
Jul 12–18
1,159
10
64,722
Jul 19–25
1,007
10
69,753
Jul 26 – Aug 1
1,050
10
59,416
Aug 2–8
748
10
59,712
Aug 9–15
770
10
55,994
Aug 16–22
573
10
54,328
Aug 23–29
376
10
51,772
Aug 30 – Sep 5
359
10
57,167
Sep 6–12
235
10
59,075
Sep 13–19
163
9
54,543
Sep 20–26
155
10
45,860
Sep 27 – Oct 3
61
9
43,180
Oct 4–10
87
8
37,841
Oct 11–17
23
8
30,824
Oct 18–24
7
3
21,156
Oct 25–31
0
0
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
0
0
8,459
Reported as an adult
Usually reported as an adult late May to early September, middle week Jul 12–18.
From 1,060 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 records here are marked as larvae yet, so there is no larva season to show. One needs at least 20 records from 5 different years.
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.
Eastern PondhawkErythemis simplicicollisOften confused in Ohio: 43 identifications in Ohio named one where the other was meant
Great Blue SkimmerLibellula vibrans207 identifications worldwide named one where the other was meant
Common Green DarnerAnax junius111 identifications worldwide named one where the other was meant
Swift SetwingDythemis velox63 identifications worldwide named one where the other was meant
Slaty SkimmerLibellula incesta55 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.
Months not reported
Jan: no record
Feb: no record
Mar: no record
Apr: recorded
May: recorded
Jun: recorded
Jul: recorded
Aug: recorded
Sep: recorded
Oct: recorded
Nov: no record
Dec: no record
Not reported in Ohio in November to March, 2016 to 2025.
Land cover where it is recorded
Land cover
Its recordsAll Ohio records
Developed
41%49%
Forest
22%31%
Farmland
14%11%
Wetland
11%5%
Open water
8%3%
Grassland and shrub
4%0.9%
Barren
1%0.6%
From 4,320 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.
