Herons in Iowa in September
Yes, September is one of the best months to see herons in Iowa. It is the 3rd busiest month of the year, with 182 of the 1,173 sightings logged across the year (15.5%), based on verified iNaturalist records.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 2, 2026.
Peak month for herons in Iowa
15.5%
of yearly sightings
182
records in September
#3
busiest month of 12
1,173
verified records a year
August 16.8%, September 15.5%, October 5.2%. Busiest month is May at 17.5%.
1,173 verified observations of herons in Iowa, recorded across 12 months of the year on iNaturalist.
When herons are recorded in Iowa
Peak month
May
205 records (17.5% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 2 | 0.2% |
| February | 5 | 0.4% |
| March | 39 | 3.3% |
| April | 170 | 14.5% |
| Maypeak | 205 | 17.5% |
| June | 155 | 13.2% |
| July | 130 | 11.1% |
| Augustpeak | 197 | 16.8% |
| Septemberpeak | 182 | 15.5% |
| October | 61 | 5.2% |
| November | 17 | 1.4% |
| December | 10 | 0.9% |
Herons you are most likely to see
| Species | Verified observations |
|---|---|
| Great Blue Heron | 674 |
| Great Egret | 217 |
| Green Heron | 172 |
| Western Cattle-Egret | 21 |
| American Bittern | 17 |
| Least Bittern | 17 |
| Black-crowned Night Heron | 13 |
| Yellow-crowned Night Heron | 9 |
In Iowa, September carries 15.5% of the year's herons sightings, about 7.2 points above an even month-to-month split. That makes it the 3rd busiest of the twelve months, out of 12 months with recorded activity.
Activity is easing off from August (16.8%) into September, and it heads toward October (5.2%) after. This is right inside the peak window, so September is one of the surest months to plan a trip around.
The herons most often recorded in Iowa are Great Blue Heron, Great Egret and Green Heron. Those counts are annual totals rather than a September split, so treat them as which species you are likely to encounter, while the month figures above show how many sightings fall in September itself.
Which herons you are most likely to see
- Great Blue Heron674 records
- Great Egret217 records
- Green Heron172 records
- Western Cattle-Egret21 records
- American Bittern17 records
- Least Bittern17 records
Plan your heron trip in Iowa
Start with live tours near Effigy Mounds National Monument, then compare a nearby stay and a broader wildlife backup before you lock in the trip.
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Use the live GetYourGuide widget to compare local departures and activity styles close to the main heron viewing area.
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Gear to see them
Frequently asked questions
Can you see herons in Iowa in September?+
Yes. September accounts for 182 of the 1,173 verified herons sightings logged in Iowa across the year, which is 15.5% of the annual total.
Is September a good time to see herons in Iowa?+
September is one of the best months. It ranks 3rd of the year and sits inside the peak window of May, August and September.
What month is best for herons in Iowa?+
May is the single busiest month, with the broader peak running through May, August and September, based on 1,173 verified observations.
Which herons are you most likely to see in Iowa?+
The most-recorded species in Iowa are Great Blue Heron, Great Egret and Green Heron, based on all-time iNaturalist counts.
See herons in Iowa in other months
More places to see herons
More wildlife in Iowa