Swift River Cruiser
Macromia illinoiensis Walsh, 1862
Swift River Cruiser in all of Ohio- Kingdom
- Animalia
- Phylum
- Arthropoda
- Class
- Insecta
- Order
- Odonata
- Family
- Macromiidae
- Genus
- Macromia
Range
Where it is recorded
Season shown in 2 of Ohio's 88 counties. Explore Ohio
- No result yet (43)
- Recorded, too few records for a result (41)
- Recorded, season not shown (2)
- Season shown (2)
Counties as a table
| 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 | Recorded, too few records for a result |
| Athens County | Recorded, too few records for a result |
| Auglaize County | No qualifying records yet |
| Belmont County | No qualifying records yet |
| Brown County | No qualifying records yet |
| Butler County | Recorded, too few records for a result |
| Carroll County | No qualifying records yet |
| Champaign County | No qualifying records yet |
| Clark County | No qualifying records yet |
| Clermont County | 34 · Season shown |
| Clinton County | No qualifying records yet |
| Columbiana County | Recorded, too few records for a result |
| Coshocton County | No qualifying records yet |
| Crawford County | Recorded, too few records for a result |
| Cuyahoga County | Recorded, too few records for a result |
| Darke County | Recorded, too few records for a result |
| Defiance County | Recorded, too few records for a result |
| Delaware County | Recorded, too few records for a result |
| Erie County | No qualifying records yet |
| Fairfield County | No qualifying records yet |
| Fayette County | No qualifying records yet |
| Franklin County | Recorded, too few records for a result |
| 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 | 24 · Recorded, season not shown |
| Hancock County | Recorded, too few records for a result |
| Hardin County | No qualifying records yet |
| Harrison County | No qualifying records yet |
| 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 | No qualifying records yet |
| Huron County | Recorded, too few records for a result |
| Jackson County | No qualifying records yet |
| Jefferson County | No qualifying records yet |
| Knox County | No qualifying records yet |
| 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 | Recorded, too few records for a result |
| Lorain County | Recorded, too few records for a result |
| Lucas County | 30 · Season shown |
| Madison County | Recorded, too few records for a result |
| Mahoning County | No qualifying records yet |
| Marion County | Recorded, too few records for a result |
| Medina County | Recorded, too few records for a result |
| Meigs County | No qualifying records yet |
| Mercer County | No qualifying records yet |
| Miami County | Recorded, too few records for a result |
| Monroe County | Recorded, too few records for a result |
| Montgomery County | 24 · Recorded, season not shown |
| Morgan County | No qualifying records yet |
| Morrow County | No qualifying records yet |
| Muskingum County | No qualifying records yet |
| Noble County | No qualifying records yet |
| Ottawa County | No qualifying records yet |
| 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 | No qualifying records yet |
| 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 | No qualifying records yet |
| 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 | Recorded, too few records for a result |
| Summit County | No qualifying records yet |
| 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 | No qualifying records yet |
| Warren County | Recorded, too few records for a result |
| Washington County | Recorded, too few records for a result |
| Wayne County | No qualifying records yet |
| Williams County | No qualifying records yet |
| Wood County | Recorded, too few records for a result |
| 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
Late May to late August, middle week Jul 26 – Aug 1
Records per week from 34 records in 5 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 34 dates. Latest record: August 2025.
Show as a table
| Week | Records of Swift River Cruiser | 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 | 0 | 0 | 898 |
| May 24–30 | 1 | 1 | 1,116 |
| May 31 – Jun 6 | 2 | 2 | 977 |
| Jun 7–13 | 3 | 3 | 942 |
| Jun 14–20 | 1 | 1 | 920 |
| Jun 21–27 | 1 | 1 | 793 |
| Jun 28 – Jul 4 | 1 | 1 | 900 |
| Jul 5–11 | 0 | 0 | 921 |
| Jul 12–18 | 3 | 1 | 886 |
| Jul 19–25 | 3 | 2 | 1,229 |
| Jul 26 – Aug 1 | 4 | 2 | 813 |
| Aug 2–8 | 1 | 1 | 1,003 |
| Aug 9–15 | 6 | 4 | 850 |
| Aug 16–22 | 3 | 3 | 880 |
| Aug 23–29 | 1 | 1 | 817 |
| Aug 30 – Sep 5 | 3 | 2 | 846 |
| Sep 6–12 | 0 | 0 | 830 |
| Sep 13–19 | 1 | 1 | 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 1 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 mid-September, middle week Jul 26 – Aug 1
Records per week from 409 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 266 dates. Latest record: September 2025.
Show as a table
| Week | Records of Swift River Cruiser | 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 | 0 | 0 | 39,925 |
| Apr 19–25 | 0 | 0 | 41,623 |
| Apr 26 – May 2 | 0 | 0 | 56,391 |
| May 3–9 | 0 | 0 | 52,952 |
| May 10–16 | 0 | 0 | 53,785 |
| May 17–23 | 0 | 0 | 57,698 |
| May 24–30 | 10 | 2 | 54,651 |
| May 31 – Jun 6 | 18 | 7 | 53,099 |
| Jun 7–13 | 23 | 8 | 53,700 |
| Jun 14–20 | 21 | 8 | 56,625 |
| Jun 21–27 | 16 | 9 | 55,361 |
| Jun 28 – Jul 4 | 14 | 7 | 58,477 |
| Jul 5–11 | 20 | 8 | 61,336 |
| Jul 12–18 | 24 | 7 | 64,722 |
| Jul 19–25 | 20 | 7 | 69,753 |
| Jul 26 – Aug 1 | 41 | 9 | 59,416 |
| Aug 2–8 | 46 | 10 | 59,712 |
| Aug 9–15 | 51 | 9 | 55,994 |
| Aug 16–22 | 27 | 8 | 54,328 |
| Aug 23–29 | 22 | 8 | 51,772 |
| Aug 30 – Sep 5 | 21 | 5 | 57,167 |
| Sep 6–12 | 12 | 6 | 59,075 |
| Sep 13–19 | 4 | 4 | 54,543 |
| Sep 20–26 | 12 | 6 | 45,860 |
| Sep 27 – Oct 3 | 5 | 2 | 43,180 |
| Oct 4–10 | 2 | 1 | 37,841 |
| Oct 11–17 | 0 | 0 | 30,824 |
| Oct 18–24 | 0 | 0 | 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
No adult season shown here. The weeks are still too uncertain to show a season.
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
Often confused with
- Royal River Cruiser Macromia taeniolata34 identifications worldwide named one where the other was meant
- Stream Cruiser Macromia transversa18 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: no record
- 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 April, 2016 to 2025.
Time of day it is recorded
From 383 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 |
|---|---|
| Forest | 31%31% |
| Developed | 26%49% |
| Farmland | 25%11% |
| Wetland | 9%5% |
| Open water | 8%3% |
| Barren | 1%0.6% |
| Grassland and shrub | 1%0.9% |
From 187 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 Clermont County result
34 records from 1 dataset.
- iNaturalist Research-grade Observations (opens in a new tab) · iNaturalist.org · 34 recordsiNaturalist contributors, iNaturalist (2026). iNaturalist Research-grade Observations. iNaturalist.org. Occurrence dataset https://doi.org/10.15468/ab3s5x accessed via GBIF.org on 2026-11-13.
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.