BeetlesIn Hamilton County, Ohio

Asian Lady Beetle

Harmonia axyridis (Pallas, 1773)

Asian Lady Beetle in all of Ohio
Asian Lady Beetle (Harmonia axyridis)
(c) Paolo Mazzei, some rights reserved (CC BY-NC), uploaded by Paolo Mazzei · CC BY-NC 4.0 (opens in a new tab) · iNaturalist (opens in a new tab)
Kingdom
Animalia
Phylum
Arthropoda
Class
Insecta
Genus
Harmonia

Introduced and invasive status

Introduced in Ohio: iNaturalist (opens in a new tab)

Also listed

  • 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.

Status: Simpson A, Sellers E, Pagad S (2023). United States Register of Introduced and Invasive Species (US-RIIS), ver. 2.0. U.S. Geological Survey, https://doi.org/10.5066/P9KFFTOD (opens in a new tab)

Near Hamilton County

Range

Where it is recorded

Season shown in 3 of Ohio's 88 counties. Explore Ohio

  • No result yet (1)
  • Recorded, too few records for a result (53)
  • Recorded, season not shown (31)
  • Season shown (3)
Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files, 1:500,000. Show as a table
Counties as a table
Asian Lady Beetle by Ohio county: records and mapped range
CountyRecords
Adams CountyRecorded, too few records for a result
Allen County23 · Recorded, season not shown
Ashland County21 · Recorded, season not shown
Ashtabula County36 · Recorded, season not shown
Athens County145 · Recorded, season not shown
Auglaize CountyRecorded, too few records for a result
Belmont CountyRecorded, too few records for a result
Brown CountyRecorded, too few records for a result
Butler County344 · Recorded, season not shown
Carroll CountyRecorded, too few records for a result
Champaign CountyRecorded, too few records for a result
Clark County29 · Recorded, season not shown
Clermont County70 · Recorded, season not shown
Clinton CountyRecorded, too few records for a result
Columbiana CountyRecorded, too few records for a result
Coshocton CountyRecorded, too few records for a result
Crawford CountyRecorded, too few records for a result
Cuyahoga County353 · Recorded, season not shown
Darke CountyRecorded, too few records for a result
Defiance CountyRecorded, too few records for a result
Delaware County123 · Recorded, season not shown
Erie County54 · Recorded, season not shown
Fairfield County61 · Recorded, season not shown
Fayette CountyRecorded, too few records for a result
Franklin County612 · Recorded, season not shown
Fulton CountyRecorded, too few records for a result
Gallia CountyRecorded, too few records for a result
Geauga County50 · Recorded, season not shown
Greene County107 · Recorded, season not shown
Guernsey CountyRecorded, too few records for a result
Hamilton County332 · Season shown
Hancock County49 · Recorded, season not shown
Hardin CountyRecorded, too few records for a result
Harrison CountyRecorded, too few records for a result
Henry CountyNo qualifying records yet
Highland CountyRecorded, too few records for a result
Hocking County50 · Recorded, season not shown
Holmes CountyRecorded, too few records for a result
Huron CountyRecorded, too few records for a result
Jackson CountyRecorded, too few records for a result
Jefferson CountyRecorded, too few records for a result
Knox CountyRecorded, too few records for a result
Lake County90 · Recorded, season not shown
Lawrence CountyRecorded, too few records for a result
Licking County72 · Recorded, season not shown
Logan CountyRecorded, too few records for a result
Lorain County108 · Recorded, season not shown
Lucas County212 · Recorded, season not shown
Madison CountyRecorded, too few records for a result
Mahoning County41 · Recorded, season not shown
Marion CountyRecorded, too few records for a result
Medina County121 · Recorded, season not shown
Meigs CountyRecorded, too few records for a result
Mercer CountyRecorded, too few records for a result
Miami County36 · Recorded, season not shown
Monroe CountyRecorded, too few records for a result
Montgomery County131 · Recorded, season not shown
Morgan CountyRecorded, too few records for a result
Morrow CountyRecorded, too few records for a result
Muskingum CountyRecorded, too few records for a result
Noble CountyRecorded, too few records for a result
Ottawa County41 · Recorded, season not shown
Paulding CountyRecorded, too few records for a result
Perry CountyRecorded, too few records for a result
Pickaway CountyRecorded, too few records for a result
Pike CountyRecorded, too few records for a result
Portage County95 · Recorded, season not shown
Preble CountyRecorded, too few records for a result
Putnam CountyRecorded, too few records for a result
Richland County32 · Recorded, season not shown
Ross CountyRecorded, too few records for a result
Sandusky CountyRecorded, too few records for a result
Scioto CountyRecorded, too few records for a result
Seneca CountyRecorded, too few records for a result
Shelby CountyRecorded, too few records for a result
Stark County106 · Recorded, season not shown
Summit County237 · Season shown
Trumbull County27 · Recorded, season not shown
Tuscarawas CountyRecorded, too few records for a result
Union CountyRecorded, too few records for a result
Van Wert CountyRecorded, too few records for a result
Vinton CountyRecorded, too few records for a result
Warren County69 · Recorded, season not shown
Washington CountyRecorded, too few records for a result
Wayne County45 · Recorded, season not shown
Williams CountyRecorded, too few records for a result
Wood County84 · Season shown
Wyandot CountyRecorded, 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 Hamilton County

Late April to mid-November, middle week Jul 26 – Aug 1

Show over the bars
Recording in Hamilton County · records of all species each week, 87,019 in all

Records per week from 332 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 241 dates. Latest record: December 2025.

Show as a table
Records of Asian Lady Beetle in Hamilton County each week, and records of all species
WeekRecords of Asian Lady BeetleYears recordedRecords of all species
Jan 4–1000392
Jan 11–1700344
Jan 18–2411312
Jan 25–3100206
Feb 1–700357
Feb 8–1400383
Feb 15–2100366
Feb 22–2800391
Mar 1–700551
Mar 8–1422523
Mar 15–2100750
Mar 22–28211,012
Mar 29 – Apr 4431,535
Apr 5–11221,960
Apr 12–18222,492
Apr 19–25222,403
Apr 26 – May 2333,783
May 3–91553,307
May 10–16932,059
May 17–231552,153
May 24–301242,390
May 31 – Jun 61772,648
Jun 7–132462,715
Jun 14–201152,695
Jun 21–27952,714
Jun 28 – Jul 41343,220
Jul 5–111052,980
Jul 12–18833,031
Jul 19–25442,961
Jul 26 – Aug 1442,795
Aug 2–8442,884
Aug 9–151062,696
Aug 16–221152,535
Aug 23–29642,536
Aug 30 – Sep 51352,606
Sep 6–121472,980
Sep 13–19862,959
Sep 20–26222,313
Sep 27 – Oct 3642,122
Oct 4–101541,828
Oct 11–17931,793
Oct 18–24931,338
Oct 25–31821,023
Nov 1–7114676
Nov 8–14185593
Nov 15–2153384
Nov 22–2873496
Nov 29 – Dec 543356
Dec 6–1211478
Dec 13–1911285
Dec 20–2611322
Dec 27 – Jan 200388

Reported as an adult

No adult season shown here. The weeks are still too uncertain to show a season.

Reported as a larva

Usually reported as a larva mid-May to late October, middle week Jun 14–20.

From 32 records that are marked as larvae. Not every photo is marked with a life stage, so this shows when people reported it as a larva, not when larvae are about.

In Ohio

Mid-March to mid-July, middle week early June, and again early August to late November, middle week late September

Recorded in two separate seasons, each shown with its own early, middle and late weeks.

Show over the bars
Recording in Ohio · records of all species each week, 1,691,199 in all

Records per week from 5,823 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 Asian Lady Beetle in Ohio each week, and records of all species
WeekRecords of Asian Lady BeetleYears recordedRecords of all species
Jan 4–10436,211
Jan 11–171165,146
Jan 18–24114,645
Jan 25–31754,698
Feb 1–71246,023
Feb 8–14535,888
Feb 15–211165,436
Feb 22–281666,846
Mar 1–72578,321
Mar 8–1437510,384
Mar 15–2144612,620
Mar 22–2821713,949
Mar 29 – Apr 433719,661
Apr 5–1129626,860
Apr 12–1881939,925
Apr 19–2548841,623
Apr 26 – May 272856,391
May 3–969952,952
May 10–1692953,785
May 17–23134857,698
May 24–301401054,651
May 31 – Jun 6178953,099
Jun 7–132541053,700
Jun 14–202561056,625
Jun 21–27289955,361
Jun 28 – Jul 4207958,477
Jul 5–112041061,336
Jul 12–181361064,722
Jul 19–25114969,753
Jul 26 – Aug 195959,416
Aug 2–8118959,712
Aug 9–151281055,994
Aug 16–22187954,328
Aug 23–291971051,772
Aug 30 – Sep 52421057,167
Sep 6–122521059,075
Sep 13–191901054,543
Sep 20–26193945,860
Sep 27 – Oct 32161043,180
Oct 4–10171937,841
Oct 11–172321030,824
Oct 18–241851021,156
Oct 25–31207819,021
Nov 1–71811014,172
Nov 8–14219912,621
Nov 15–2111277,965
Nov 22–284768,136
Nov 29 – Dec 53596,083
Dec 6–122776,004
Dec 13–191795,423
Dec 20–262065,661
Dec 27 – Jan 22288,459

Reported as an adult

Usually reported as an adult late March to mid-November, middle week Aug 23–29.

From 1,131 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

Usually reported as a larva mid-May to mid-July, middle week mid-June, and again early August to late October, 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.

Often confused with

  • Polished Lady Beetle Cycloneda mundaOften confused in Ohio: 92 identifications in Ohio named one where the other was meant
  • Seven-spotted Lady Beetle Coccinella septempunctataOften confused in Ohio: 58 identifications in Ohio named one where the other was meant
  • Convergent Lady Beetle Hippodamia convergensOften confused in Ohio: 22 identifications in Ohio named one where the other was meant
  • Variegated Lady Beetle Hippodamia variegataOften confused in Ohio: 18 identifications in Ohio named one where the other was meant
  • Swamp Milkweed Leaf Beetle Labidomera clivicollisOften confused in Ohio: 12 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 recordsNo season shown · 5,823 records
  • Reported as an adultUsually late March to mid-November, middle week late August · 1,131 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 coverIts recordsAll Ohio records
Developed75%49%
Forest13%31%
Farmland8%11%
Wetland1%5%
Open water0.9%3%
Barren0.8%0.6%
Grassland and shrub0.3%0.9%

From 3,603 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
  • See it on iNaturalist (opens in a new tab)OpenPhenology is independent and not affiliated with iNaturalist.

Records behind the Hamilton County result

332 records from 1 dataset.

To cite: the GBIF download doi:10.15468/dl.y2jkt8 (opens in a new tab).

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.