Season shown in 11 of Ohio's 88 counties. Explore Ohio
No result yet (9)
Recorded, too few records for a result (50)
Recorded, season not shown (18)
Season shown (11)
Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files, 1:500,000. Show as a table
Counties as a table
Black Swallowtail by Ohio county: records and mapped range
County
Records
Adams County
20 · Recorded, season not shown
Allen County
22 · Recorded, season not shown
Ashland County
Recorded, too few records for a result
Ashtabula County
Recorded, too few records for a result
Athens County
25 · Recorded, season not shown
Auglaize County
Recorded, too few records for a result
Belmont County
Recorded, too few records for a result
Brown County
Recorded, too few records for a result
Butler County
98 · Recorded, season not shown
Carroll County
Recorded, too few records for a result
Champaign County
Recorded, too few records for a result
Clark County
48 · Recorded, season not shown
Clermont County
58 · 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
Recorded, too few records for a result
Cuyahoga County
216 · Season shown
Darke County
Recorded, too few records for a result
Defiance County
Recorded, too few records for a result
Delaware County
80 · Recorded, season not shown
Erie County
28 · Recorded, season not shown
Fairfield County
68 · Recorded, season not shown
Fayette County
Recorded, too few records for a result
Franklin County
504 · Season shown
Fulton County
Recorded, too few records for a result
Gallia County
Recorded, too few records for a result
Geauga County
Recorded, too few records for a result
Greene County
125 · Recorded, season not shown
Guernsey County
Recorded, too few records for a result
Hamilton County
240 · Recorded, season not shown
Hancock County
51 · Season shown
Hardin County
Recorded, too few records for a result
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
Recorded, too few records for a result
Holmes County
Recorded, too few records for a result
Huron County
No qualifying records yet
Jackson County
Recorded, too few records for a result
Jefferson County
Recorded, too few records for a result
Knox County
56 · Recorded, season not shown
Lake County
67 · Season shown
Lawrence County
Recorded, too few records for a result
Licking County
94 · Season shown
Logan County
Recorded, too few records for a result
Lorain County
57 · Recorded, season not shown
Lucas County
164 · Season shown
Madison County
Recorded, too few records for a result
Mahoning County
Recorded, too few records for a result
Marion County
Recorded, too few records for a result
Medina County
95 · Season shown
Meigs County
Recorded, too few records for a result
Mercer County
Recorded, too few records for a result
Miami County
Recorded, too few records for a result
Monroe County
Recorded, too few records for a result
Montgomery County
190 · Season shown
Morgan County
No qualifying records yet
Morrow County
Recorded, too few records for a result
Muskingum County
Recorded, too few records for a result
Noble County
No qualifying records yet
Ottawa County
33 · Recorded, season not shown
Paulding County
Recorded, too few records for a result
Perry County
Recorded, too few records for a result
Pickaway County
Recorded, too few records for a result
Pike County
No qualifying records yet
Portage County
31 · Recorded, season not shown
Preble County
Recorded, too few records for a result
Putnam County
No qualifying records yet
Richland County
28 · Recorded, season not shown
Ross County
Recorded, too few records for a result
Sandusky County
Recorded, too few records for a result
Scioto County
No qualifying records yet
Seneca County
Recorded, too few records for a result
Shelby County
Recorded, too few records for a result
Stark County
107 · Season shown
Summit County
149 · Season shown
Trumbull County
Recorded, too few records for a result
Tuscarawas County
Recorded, too few records for a result
Union County
Recorded, too few records for a result
Van Wert County
Recorded, too few records for a result
Vinton County
No qualifying records yet
Warren County
48 · Recorded, season not shown
Washington County
Recorded, too few records for a result
Wayne County
71 · Season shown
Williams County
No qualifying records yet
Wood County
38 · Recorded, season not shown
Wyandot County
Recorded, too few records for a result
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
Mid-April to early August, middle week mid-July
Recorded in two separate seasons, each shown with its own early, middle and late weeks. A later season is not shown: most records are from one year.
JanFebMarAprMayJunJulAugSepOctNovDec
Show over the bars
Recording in Clermont County · records of all species each week, 25,341 in all
Records per week from 58 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 Black Swallowtail in Clermont County each week, and records of all species
Week
Records of Black Swallowtail
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
3
2
705
Apr 19–25
1
1
753
Apr 26 – May 2
0
0
745
May 3–9
1
1
760
May 10–16
1
1
589
May 17–23
0
0
898
May 24–30
0
0
1,116
May 31 – Jun 6
2
2
977
Jun 7–13
0
0
942
Jun 14–20
1
1
920
Jun 21–27
0
0
793
Jun 28 – Jul 4
5
3
900
Jul 5–11
2
2
921
Jul 12–18
2
1
886
Jul 19–25
5
4
1,229
Jul 26 – Aug 1
4
3
813
Aug 2–8
4
3
1,003
Aug 9–15
1
1
850
Aug 16–22
1
1
880
Aug 23–29
4
1
817
Aug 30 – Sep 5
7
5
846
Sep 6–12
2
2
830
Sep 13–19
3
2
642
Sep 20–26
6
4
529
Sep 27 – Oct 3
1
1
494
Oct 4–10
2
1
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
No adult season shown here. The weeks are still too uncertain to show a season.
Reported as a caterpillar
No caterpillar season shown here. Most records come from a single year, so a season is not shown yet.
In Ohio
Mid-May to early October, middle week Aug 9–15
Middle week · Aug 9–15
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 4,109 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 1,239 dates. Latest record: December 2025.
Show as a table
Records of Black Swallowtail in Ohio each week, and records of all species
Week
Records of Black Swallowtail
Years recorded
Records of all species
Jan 4–10
1
1
6,211
Jan 11–17
0
0
5,146
Jan 18–24
1
1
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
1
1
8,321
Mar 8–14
1
1
10,384
Mar 15–21
0
0
12,620
Mar 22–28
1
1
13,949
Mar 29 – Apr 4
1
1
19,661
Apr 5–11
5
4
26,860
Apr 12–18
13
5
39,925
Apr 19–25
22
8
41,623
Apr 26 – May 2
31
9
56,391
May 3–9
28
9
52,952
May 10–16
47
7
53,785
May 17–23
61
10
57,698
May 24–30
94
10
54,651
May 31 – Jun 6
81
9
53,099
Jun 7–13
111
10
53,700
Jun 14–20
77
10
56,625
Jun 21–27
89
10
55,361
Jun 28 – Jul 4
135
9
58,477
Jul 5–11
186
10
61,336
Jul 12–18
216
10
64,722
Jul 19–25
265
10
69,753
Jul 26 – Aug 1
228
10
59,416
Aug 2–8
222
9
59,712
Aug 9–15
198
9
55,994
Aug 16–22
295
10
54,328
Aug 23–29
320
10
51,772
Aug 30 – Sep 5
312
9
57,167
Sep 6–12
308
10
59,075
Sep 13–19
237
10
54,543
Sep 20–26
198
10
45,860
Sep 27 – Oct 3
103
9
43,180
Oct 4–10
91
9
37,841
Oct 11–17
59
9
30,824
Oct 18–24
33
8
21,156
Oct 25–31
16
7
19,021
Nov 1–7
10
5
14,172
Nov 8–14
9
5
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
0
0
6,004
Dec 13–19
0
0
5,423
Dec 20–26
1
1
5,661
Dec 27 – Jan 2
1
0
8,459
Reported as an adult
Usually reported as an adult early May to mid-September, middle week Aug 2–8.
From 2,493 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 caterpillar
Usually reported as a caterpillar early June to mid-October, middle week Aug 16–22.
From 1,511 records that are marked as caterpillars. Not every photo is marked with a life stage, so this shows when people reported it as a caterpillar, not when caterpillars are about.
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.
Spicebush SwallowtailPapilio troilusOften confused in Ohio: 129 identifications in Ohio named one where the other was meant
Eastern Tiger SwallowtailPapilio glaucusOften confused in Ohio: 53 identifications in Ohio named one where the other was meant
Red-spotted AdmiralLimenitis arthemisOften confused in Ohio: 12 identifications in Ohio named one where the other was meant
MonarchDanaus (Danaus) plexippusOften confused in Ohio: 10 identifications in Ohio named one where the other was meant
Pipevine SwallowtailBattus philenorOften confused in Ohio: 10 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 recordsUsually mid-May to early October, middle week early August · 4,109 records
Reported as a caterpillarUsually early June to mid-October, middle week mid-August · 1,511 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
68%49%
Farmland
20%11%
Forest
8%31%
Wetland
2%5%
Grassland and shrub
1%0.9%
Open water
0.6%3%
Barren
0.4%0.6%
From 2,331 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)
Finer identifications
Some Ohio records of this species were identified to a subspecies:
Every one of these records counts toward the Black Swallowtail's season above.
Why some records go further than species
Many species vary from place to place. Groups of a species that look or sound a little different, and live in different areas, can be named as subspecies. Observers and experts only identify a record that far when it shows enough detail to tell them apart. Records without that detail count at the species level.
Names: Catalogue of Life.
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.
