Tree Frogs in Iowa in May
Yes, May is one of the best months to see tree frogs in Iowa. It is the 1st busiest month of the year, with 463 of the 2,584 sightings logged across the year (17.9%), 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 tree frogs in Iowa
17.9%
of yearly sightings
463
records in May
#1
busiest month of 12
2,584
verified records a year
April 10.5%, May 17.9%, June 15.8%. Busiest month is May at 17.9%.
2,584 verified observations of tree frogs in Iowa, recorded across 12 months of the year on iNaturalist.
When tree frogs are recorded in Iowa
Peak month
May
463 records (17.9% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 2 | 0.1% |
| February | 2 | 0.1% |
| March | 87 | 3.4% |
| April | 272 | 10.5% |
| Maypeak | 463 | 17.9% |
| Junepeak | 407 | 15.8% |
| July | 339 | 13.1% |
| Augustpeak | 406 | 15.7% |
| September | 405 | 15.7% |
| October | 170 | 6.6% |
| November | 25 | 1% |
| December | 6 | 0.2% |
Tree Frogs you are most likely to see
| Species | Verified observations |
|---|---|
| Blanchard's Cricket Frog | 869 |
| Boreal Chorus Frog | 369 |
| Gray Treefrog | 288 |
| Cope's Gray Tree Frog | 123 |
| Spring Peeper | 54 |
| Pacific chorus frog | 1 |
| Green Treefrog | 1 |
In Iowa, May carries 17.9% of the year's tree frogs sightings, about 9.6 points above an even month-to-month split. That makes it the 1st busiest of the twelve months, out of 12 months with recorded activity.
Activity is rising from April (10.5%) into May, and it heads toward June (15.8%) after. This is right inside the peak window, so May is one of the surest months to plan a trip around.
The tree frogs most often recorded in Iowa are Blanchard's Cricket Frog, Boreal Chorus Frog and Gray Treefrog. Those counts are annual totals rather than a May split, so treat them as which species you are likely to encounter, while the month figures above show how many sightings fall in May itself.
Which tree frogs you are most likely to see
- Blanchard's Cricket Frog869 records
- Boreal Chorus Frog369 records
- Gray Treefrog288 records
- Cope's Gray Tree Frog123 records
- Spring Peeper54 records
- Pacific chorus frog1 records
Plan your tree frog 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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Live tours nearbySee live tours near Effigy Mounds National Monument
Use the live GetYourGuide widget to compare local departures and activity styles close to the main tree frog viewing area.
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Compare hotels, cabins and lodges close to the best tree frog viewing area in Iowa.
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Broader backupBook a tree frog tour in Iowa
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Frequently asked questions
Can you see tree frogs in Iowa in May?+
Yes. May accounts for 463 of the 2,584 verified tree frogs sightings logged in Iowa across the year, which is 17.9% of the annual total.
Is May a good time to see tree frogs in Iowa?+
May is one of the best months. It ranks 1st of the year and sits inside the peak window of May, June and August.
What month is best for tree frogs in Iowa?+
May is the single busiest month, with the broader peak running through May, June and August, based on 2,584 verified observations.
Which tree frogs are you most likely to see in Iowa?+
The most-recorded species in Iowa are Blanchard's Cricket Frog, Boreal Chorus Frog and Gray Treefrog, based on all-time iNaturalist counts.
See tree frogs in Iowa in other months
More places to see tree frogs
More wildlife in Iowa