Introduced and assessed as invasive in the lower 48 states
iNaturalist's volunteer curators list it as introduced in their Ohio checklist.
US-RIIS assesses a species as invasive when it causes, or is likely to cause, harm there, or is at least locally abundant and harmful ecologically, economically, or to health.
Season shown in 6 of Ohio's 88 counties. Explore Ohio
No result yet (6)
Recorded, too few records for a result (55)
Recorded, season not shown (21)
Season shown (6)
Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files, 1:500,000. Show as a table
Counties as a table
Small White by Ohio county: records and mapped range
County
Records
Adams County
Recorded, too few records for a result
Allen County
Recorded, too few records for a result
Ashland County
Recorded, too few records for a result
Ashtabula County
44 · Recorded, season not shown
Athens County
23 · 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
130 · Recorded, season not shown
Carroll County
Recorded, too few records for a result
Champaign County
Recorded, too few records for a result
Clark County
25 · Recorded, season not shown
Clermont County
28 · 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
226 · Season shown
Darke County
Recorded, too few records for a result
Defiance County
Recorded, too few records for a result
Delaware County
35 · Recorded, season not shown
Erie County
35 · Recorded, season not shown
Fairfield County
20 · Recorded, season not shown
Fayette County
Recorded, too few records for a result
Franklin County
305 · 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
88 · Season shown
Guernsey County
No qualifying records yet
Hamilton County
303 · Recorded, season not shown
Hancock County
23 · Recorded, season not shown
Hardin County
Recorded, too few records for a result
Harrison County
Recorded, too few records for a result
Henry County
Recorded, too few records for a result
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
Recorded, too few records for a result
Jackson County
Recorded, too few records for a result
Jefferson County
Recorded, too few records for a result
Knox County
32 · Recorded, season not shown
Lake County
49 · Recorded, season not shown
Lawrence County
No qualifying records yet
Licking County
113 · Recorded, season not shown
Logan County
Recorded, too few records for a result
Lorain County
42 · Recorded, season not shown
Lucas County
114 · Recorded, season not 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
46 · Season shown
Meigs County
No qualifying records yet
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
105 · Season shown
Morgan County
Recorded, too few records for a result
Morrow County
Recorded, too few records for a result
Muskingum County
Recorded, too few records for a result
Noble County
Recorded, too few records for a result
Ottawa County
29 · Recorded, season not shown
Paulding County
Recorded, too few records for a result
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
48 · Recorded, season not shown
Preble County
Recorded, too few records for a result
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
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
120 · Recorded, season not shown
Summit County
183 · 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
Recorded, too few records for a result
Warren County
40 · Recorded, season not shown
Washington County
Recorded, too few records for a result
Wayne County
49 · Recorded, season not shown
Williams County
Recorded, too few records for a result
Wood County
31 · 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 Medina County
Mid-April to mid-September, middle week Jul 19–25
Middle week · Jul 19–25
This week · Nov 8–14
JanFebMarAprMayJunJulAugSepOctNovDec
Show over the bars
Recording in Medina County · records of all species each week, 24,971 in all
Records per week from 46 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 36 dates. Latest record: August 2025.
Show as a table
Records of Small White in Medina County each week, and records of all species
Week
Records of Small White
Years recorded
Records of all species
Jan 4–10
0
0
111
Jan 11–17
0
0
88
Jan 18–24
0
0
113
Jan 25–31
0
0
99
Feb 1–7
0
0
125
Feb 8–14
0
0
136
Feb 15–21
0
0
133
Feb 22–28
0
0
165
Mar 1–7
0
0
128
Mar 8–14
0
0
211
Mar 15–21
1
1
285
Mar 22–28
0
0
250
Mar 29 – Apr 4
0
0
292
Apr 5–11
1
1
470
Apr 12–18
3
3
621
Apr 19–25
2
2
796
Apr 26 – May 2
2
2
971
May 3–9
0
0
791
May 10–16
1
1
636
May 17–23
2
1
631
May 24–30
0
0
804
May 31 – Jun 6
2
2
713
Jun 7–13
0
0
781
Jun 14–20
2
1
596
Jun 21–27
0
0
728
Jun 28 – Jul 4
3
2
845
Jul 5–11
2
1
772
Jul 12–18
1
1
906
Jul 19–25
2
1
899
Jul 26 – Aug 1
8
2
974
Aug 2–8
2
2
1,018
Aug 9–15
1
1
787
Aug 16–22
1
1
765
Aug 23–29
1
1
675
Aug 30 – Sep 5
0
0
836
Sep 6–12
1
1
920
Sep 13–19
3
1
740
Sep 20–26
3
3
670
Sep 27 – Oct 3
0
0
783
Oct 4–10
0
0
464
Oct 11–17
1
1
349
Oct 18–24
0
0
262
Oct 25–31
1
1
245
Nov 1–7
0
0
251
Nov 8–14
0
0
236
Nov 15–21
0
0
144
Nov 22–28
0
0
161
Nov 29 – Dec 5
0
0
122
Dec 6–12
0
0
110
Dec 13–19
0
0
107
Dec 20–26
0
0
114
Dec 27 – Jan 2
0
0
142
Reported as an adult
Usually reported as an adult mid-April to mid-September, middle week Jul 26 – Aug 1.
From 43 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
Only 2 records here are marked as caterpillars, too few to show a caterpillar season. One needs at least 20 records from 5 different years.
In Ohio
Mid-April to mid-October, middle week Aug 2–8
Middle week · Aug 2–8
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 3,452 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 1,253 dates. Latest record: November 2025.
Show as a table
Records of Small White in Ohio each week, and records of all species
Week
Records of Small White
Years recorded
Records of all species
Jan 4–10
0
0
6,211
Jan 11–17
2
1
5,146
Jan 18–24
0
0
4,645
Jan 25–31
0
0
4,698
Feb 1–7
1
1
6,023
Feb 8–14
0
0
5,888
Feb 15–21
0
0
5,436
Feb 22–28
1
1
6,846
Mar 1–7
1
1
8,321
Mar 8–14
4
2
10,384
Mar 15–21
7
5
12,620
Mar 22–28
11
5
13,949
Mar 29 – Apr 4
24
8
19,661
Apr 5–11
39
8
26,860
Apr 12–18
58
9
39,925
Apr 19–25
69
10
41,623
Apr 26 – May 2
68
10
56,391
May 3–9
51
10
52,952
May 10–16
31
8
53,785
May 17–23
16
6
57,698
May 24–30
27
6
54,651
May 31 – Jun 6
61
9
53,099
Jun 7–13
94
9
53,700
Jun 14–20
170
10
56,625
Jun 21–27
122
10
55,361
Jun 28 – Jul 4
154
10
58,477
Jul 5–11
145
10
61,336
Jul 12–18
150
9
64,722
Jul 19–25
151
10
69,753
Jul 26 – Aug 1
167
10
59,416
Aug 2–8
156
10
59,712
Aug 9–15
155
10
55,994
Aug 16–22
158
10
54,328
Aug 23–29
175
10
51,772
Aug 30 – Sep 5
170
9
57,167
Sep 6–12
160
10
59,075
Sep 13–19
178
10
54,543
Sep 20–26
159
10
45,860
Sep 27 – Oct 3
133
9
43,180
Oct 4–10
139
9
37,841
Oct 11–17
106
7
30,824
Oct 18–24
54
7
21,156
Oct 25–31
39
8
19,021
Nov 1–7
20
8
14,172
Nov 8–14
17
6
12,621
Nov 15–21
2
2
7,965
Nov 22–28
5
2
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
1
8,459
Reported as an adult
Usually reported as an adult mid-April to mid-October, middle week Aug 2–8.
From 3,346 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 May to mid-July, middle week late June, and again early August to early November, middle week mid-September.
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.
Checkered WhitePontia protodice372 identifications worldwide named one where the other was meant
Mustard WhitePieris oleracea150 identifications worldwide named one where the other was meant
Clouded SulphurColias philodice92 identifications worldwide named one where the other was meant
West Virginia WhitePieris virginiensis85 identifications worldwide named one where the other was meant
Cloudless SulphurPhoebis sennae42 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.
Land cover where it is recorded
Land cover
Its recordsAll Ohio records
Developed
70%49%
Farmland
13%11%
Forest
12%31%
Wetland
3%5%
Grassland and shrub
1%0.9%
Open water
0.8%3%
Barren
0.6%0.6%
From 1,699 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:
Pieris rapae rapaesubspecies
Every one of these records counts toward the Small White'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.
